125649715 has 4 divisors (see below), whose sum is σ = 150779664. Its totient is φ = 100519768.

The previous prime is 125649683. The next prime is 125649749. The reversal of 125649715 is 517946521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 517946521 = 103 ⋅5028607.

It is a cyclic number.

It is not a de Polignac number, because 125649715 - 2⁵ = 125649683 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12564967 + ... + 12564976.

It is an arithmetic number, because the mean of its divisors is an integer number (37694916).

Almost surely, 2^125649715 is an apocalyptic number.

125649715 is a deficient number, since it is larger than the sum of its proper divisors (25129949).

125649715 is an equidigital number, since it uses as much as digits as its factorization.

125649715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25129948.

The product of its digits is 75600, while the sum is 40.

The square root of 125649715 is about 11209.3583670075. The cubic root of 125649715 is about 500.8647900806.

The spelling of 125649715 in words is "one hundred twenty-five million, six hundred forty-nine thousand, seven hundred fifteen".