125523491 has 2 divisors, whose sum is σ = 125523492. Its totient is φ = 125523490.

The previous prime is 125523479. The next prime is 125523521. The reversal of 125523491 is 194325521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125523491 - 2¹⁸ = 125261347 is a prime.

It is a super-2 number, since 2×125523491² = 31512293585654162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125523191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62761745 + 62761746.

It is an arithmetic number, because the mean of its divisors is an integer number (62761746).

Almost surely, 2^125523491 is an apocalyptic number.

125523491 is a deficient number, since it is larger than the sum of its proper divisors (1).

125523491 is an equidigital number, since it uses as much as digits as its factorization.

125523491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 125523491 is about 11203.7266567870. The cubic root of 125523491 is about 500.6970158862.

The spelling of 125523491 in words is "one hundred twenty-five million, five hundred twenty-three thousand, four hundred ninety-one".