125647013 has 4 divisors (see below), whose sum is σ = 125780640. Its totient is φ = 125513388.

The previous prime is 125647003. The next prime is 125647021. The reversal of 125647013 is 310746521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310746521 = 127 ⋅2446823.

It is a cyclic number.

It is not a de Polignac number, because 125647013 - 2¹⁸ = 125384869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125647003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65393 + ... + 67286.

It is an arithmetic number, because the mean of its divisors is an integer number (31445160).

Almost surely, 2^125647013 is an apocalyptic number.

It is an amenable number.

125647013 is a deficient number, since it is larger than the sum of its proper divisors (133627).

125647013 is an equidigital number, since it uses as much as digits as its factorization.

125647013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133626.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 125647013 is about 11209.2378420658. The cubic root of 125647013 is about 500.8611998181.

The spelling of 125647013 in words is "one hundred twenty-five million, six hundred forty-seven thousand, thirteen".