1153520520 has 32 divisors (see below), whose sum is σ = 3460561920. Its totient is φ = 307605440.

The previous prime is 1153520507. The next prime is 1153520521. The reversal of 1153520520 is 250253511.

It is a happy number.

It is a super-2 number, since 2×1153520520² = 2661219180122140800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1153520521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4806216 + ... + 4806455.

It is an arithmetic number, because the mean of its divisors is an integer number (108142560).

Almost surely, 2^1153520520 is an apocalyptic number.

1153520520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1153520520 is an abundant number, since it is smaller than the sum of its proper divisors (2307041400).

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

1153520520 is a wasteful number, since it uses less digits than its factorization.

1153520520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9612685 (or 9612681 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1153520520 is about 33963.5174856787. The cubic root of 1153520520 is about 1048.7575690002.

The spelling of 1153520520 in words is "one billion, one hundred fifty-three million, five hundred twenty thousand, five hundred twenty".