1145112520 has 128 divisors (see below), whose sum is σ = 2891116800. Its totient is φ = 405651456.

The previous prime is 1145112511. The next prime is 1145112547. The reversal of 1145112520 is 252115411.

It is a super-2 number, since 2×1145112520² = 2622565366921500800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1145112491 and 1145112500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3397792 + ... + 3398128.

It is an arithmetic number, because the mean of its divisors is an integer number (22586850).

Almost surely, 2^1145112520 is an apocalyptic number.

1145112520 is a gapful number since it is divisible by the number (10) 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 1145112520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1445558400).

1145112520 is an abundant number, since it is smaller than the sum of its proper divisors (1746004280).

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

1145112520 is a wasteful number, since it uses less digits than its factorization.

1145112520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1145112520 is about 33839.5112257846. The cubic root of 1145112520 is about 1046.2032247620.

Adding to 1145112520 its reverse (252115411), we get a palindrome (1397227931).

The spelling of 1145112520 in words is "one billion, one hundred forty-five million, one hundred twelve thousand, five hundred twenty".