1157407523 has 4 divisors (see below), whose sum is σ = 1157735208. Its totient is φ = 1157079840.

The previous prime is 1157407501. The next prime is 1157407529. The reversal of 1157407523 is 3257047511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3257047511 = 3121 ⋅1043591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1157407523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157407529) 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, 158486 + ... + 165627.

It is an arithmetic number, because the mean of its divisors is an integer number (289433802).

Almost surely, 2^1157407523 is an apocalyptic number.

1157407523 is a deficient number, since it is larger than the sum of its proper divisors (327685).

1157407523 is an equidigital number, since it uses as much as digits as its factorization.

1157407523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327684.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 1157407523 is about 34020.6925708458. The cubic root of 1157407523 is about 1049.9342431987.

The spelling of 1157407523 in words is "one billion, one hundred fifty-seven million, four hundred seven thousand, five hundred twenty-three".