1155507156 has 36 divisors (see below), whose sum is σ = 2922814804. Its totient is φ = 384912000.

The previous prime is 1155507131. The next prime is 1155507191. The reversal of 1155507156 is 6517055511.

1155507156 = T₂₈₈ + T₂₈₉ + ... + T₁₉₀₈.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 304851600 + 850655556 = 17460^2 + 29166^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1155507156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48456 + ... + 68256.

Almost surely, 2^1155507156 is an apocalyptic number.

It is an amenable number.

1155507156 is an abundant number, since it is smaller than the sum of its proper divisors (1767307648).

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

1155507156 is a wasteful number, since it uses less digits than its factorization.

1155507156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21432 (or 21427 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The square root of 1155507156 is about 33992.7515214641. The cubic root of 1155507156 is about 1049.3592934763.

The spelling of 1155507156 in words is "one billion, one hundred fifty-five million, five hundred seven thousand, one hundred fifty-six".