1157252921 has 16 divisors (see below), whose sum is σ = 1299485376. Its totient is φ = 1021440000.

The previous prime is 1157252869. The next prime is 1157252923. The reversal of 1157252921 is 1292527511.

It is a cyclic number.

It is not a de Polignac number, because 1157252921 - 2⁶ = 1157252857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157252923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89081 + ... + 101241.

It is an arithmetic number, because the mean of its divisors is an integer number (81217836).

Almost surely, 2^1157252921 is an apocalyptic number.

1157252921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1157252921 is a deficient number, since it is larger than the sum of its proper divisors (142232455).

1157252921 is a wasteful number, since it uses less digits than its factorization.

1157252921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12424.

The product of its digits is 12600, while the sum is 35.

The square root of 1157252921 is about 34018.4203189978. The cubic root of 1157252921 is about 1049.8874924048.

The spelling of 1157252921 in words is "one billion, one hundred fifty-seven million, two hundred fifty-two thousand, nine hundred twenty-one".