1131420550 has 144 divisors (see below), whose sum is σ = 2542181040. Its totient is φ = 371312640.

The previous prime is 1131420539. The next prime is 1131420553. The reversal of 1131420550 is 550241311.

It is a happy number.

It is a super-2 number, since 2×1131420550² = 2560224921924605000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131420553) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 3568992 + ... + 3569308.

It is an arithmetic number, because the mean of its divisors is an integer number (17654035).

Almost surely, 2^1131420550 is an apocalyptic number.

1131420550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131420550 is an abundant number, since it is smaller than the sum of its proper divisors (1410760490).

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

1131420550 is a wasteful number, since it uses less digits than its factorization.

1131420550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1131420550 is about 33636.5953984645. The cubic root of 1131420550 is about 1042.0167197556.

Adding to 1131420550 its reverse (550241311), we get a palindrome (1681661861).

The spelling of 1131420550 in words is "one billion, one hundred thirty-one million, four hundred twenty thousand, five hundred fifty".