125239739 has 4 divisors (see below), whose sum is σ = 125311080. Its totient is φ = 125168400.

The previous prime is 125239691. The next prime is 125239753. The reversal of 125239739 is 937932521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937932521 = 4817 ⋅194713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125239739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125239696 and 125239705.

It is not an unprimeable number, because it can be changed into a prime (125239769) 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, 32969 + ... + 36570.

It is an arithmetic number, because the mean of its divisors is an integer number (31327770).

Almost surely, 2^125239739 is an apocalyptic number.

125239739 is a deficient number, since it is larger than the sum of its proper divisors (71341).

125239739 is an equidigital number, since it uses as much as digits as its factorization.

125239739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71340.

The product of its digits is 102060, while the sum is 41.

The square root of 125239739 is about 11191.0562057386. The cubic root of 125239739 is about 500.3194478627.

The spelling of 125239739 in words is "one hundred twenty-five million, two hundred thirty-nine thousand, seven hundred thirty-nine".