1131420528 has 160 divisors (see below), whose sum is σ = 3739998720. Its totient is φ = 320785920.

The previous prime is 1131420517. The next prime is 1131420539. The reversal of 1131420528 is 8250241311.

1131420528 is a `hidden beast` number, since 1 + 131 + 4 + 2 + 0 + 528 = 666.

It is an interprime number because it is at equal distance from previous prime (1131420517) and next prime (1131420539).

It is a super-2 number, since 2×1131420528² = 2560224822359597568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 412923 + ... + 415653.

It is an arithmetic number, because the mean of its divisors is an integer number (23374992).

Almost surely, 2^1131420528 is an apocalyptic number.

1131420528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131420528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1869999360).

1131420528 is an abundant number, since it is smaller than the sum of its proper divisors (2608578192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131420528 is a wasteful number, since it uses less digits than its factorization.

1131420528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892 (or 2880 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1131420528 is about 33636.5950714397. The cubic root of 1131420528 is about 1042.0167130017.

Adding to 1131420528 its reverse (8250241311), we get a palindrome (9381661839).

The spelling of 1131420528 in words is "one billion, one hundred thirty-one million, four hundred twenty thousand, five hundred twenty-eight".