1155660252 has 24 divisors (see below), whose sum is σ = 2753915136. Its totient is φ = 377023728.

The previous prime is 1155660239. The next prime is 1155660263. The reversal of 1155660252 is 2520665511.

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 7 ways as a sum of consecutive naturals, for example, 1023958 + ... + 1025085.

It is an arithmetic number, because the mean of its divisors is an integer number (114746464).

Almost surely, 2^1155660252 is an apocalyptic number.

1155660252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155660252 is an abundant number, since it is smaller than the sum of its proper divisors (1598254884).

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

1155660252 is a wasteful number, since it uses less digits than its factorization.

1155660252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049097 (or 2049095 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 1155660252 is about 33995.0033387261. The cubic root of 1155660252 is about 1049.4056354987.

The spelling of 1155660252 in words is "one billion, one hundred fifty-five million, six hundred sixty thousand, two hundred fifty-two".