125406387 has 20 divisors (see below), whose sum is σ = 191327136. Its totient is φ = 81822960.

The previous prime is 125406349. The next prime is 125406389. The reversal of 125406387 is 783604521.

125406387 is a `hidden beast` number, since 12 + 5 + 4 + 0 + 638 + 7 = 666.

It is not a de Polignac number, because 125406387 - 2⁸ = 125406131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125406389) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12664 + ... + 20277.

Almost surely, 2^125406387 is an apocalyptic number.

125406387 is a deficient number, since it is larger than the sum of its proper divisors (65920749).

125406387 is an equidigital number, since it uses as much as digits as its factorization.

125406387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33000 (or 32991 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 125406387 is about 11198.4993191052. The cubic root of 125406387 is about 500.5412631902.

The spelling of 125406387 in words is "one hundred twenty-five million, four hundred six thousand, three hundred eighty-seven".