1157642501 has 4 divisors (see below), whose sum is σ = 1163460000. Its totient is φ = 1151825004.

The previous prime is 1157642471. The next prime is 1157642513. The reversal of 1157642501 is 1052467511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1157642501 - 2²⁶ = 1090533637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157642581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2908451 + ... + 2908848.

It is an arithmetic number, because the mean of its divisors is an integer number (290865000).

Almost surely, 2^1157642501 is an apocalyptic number.

It is an amenable number.

1157642501 is a deficient number, since it is larger than the sum of its proper divisors (5817499).

1157642501 is an equidigital number, since it uses as much as digits as its factorization.

1157642501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5817498.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1157642501 is about 34024.1458526147. The cubic root of 1157642501 is about 1050.0052912810.

The spelling of 1157642501 in words is "one billion, one hundred fifty-seven million, six hundred forty-two thousand, five hundred one".