125664419 has 2 divisors, whose sum is σ = 125664420. Its totient is φ = 125664418.

The previous prime is 125664403. The next prime is 125664443. The reversal of 125664419 is 914466521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125664419 - 2⁴ = 125664403 is a prime.

It is a super-2 number, since 2×125664419² = 31583092405215122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125664449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62832209 + 62832210.

It is an arithmetic number, because the mean of its divisors is an integer number (62832210).

Almost surely, 2^125664419 is an apocalyptic number.

125664419 is a deficient number, since it is larger than the sum of its proper divisors (1).

125664419 is an equidigital number, since it uses as much as digits as its factorization.

125664419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 125664419 is about 11210.0142283585. The cubic root of 125664419 is about 500.8843270094.

The spelling of 125664419 in words is "one hundred twenty-five million, six hundred sixty-four thousand, four hundred nineteen".