125521499 has 2 divisors, whose sum is σ = 125521500. Its totient is φ = 125521498.

The previous prime is 125521477. The next prime is 125521519. The reversal of 125521499 is 994125521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125521499 - 2⁸ = 125521243 is a prime.

It is a super-2 number, since 2×125521499² = 31511293422414002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125521199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62760749 + 62760750.

It is an arithmetic number, because the mean of its divisors is an integer number (62760750).

Almost surely, 2^125521499 is an apocalyptic number.

125521499 is a deficient number, since it is larger than the sum of its proper divisors (1).

125521499 is an equidigital number, since it uses as much as digits as its factorization.

125521499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 125521499 is about 11203.6377574429. The cubic root of 125521499 is about 500.6943672618.

The spelling of 125521499 in words is "one hundred twenty-five million, five hundred twenty-one thousand, four hundred ninety-nine".