125306239 has 2 divisors, whose sum is σ = 125306240. Its totient is φ = 125306238.

The previous prime is 125306221. The next prime is 125306287. The reversal of 125306239 is 932603521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125306239 - 2²¹ = 123209087 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125306239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125306219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62653119 + 62653120.

It is an arithmetic number, because the mean of its divisors is an integer number (62653120).

Almost surely, 2^125306239 is an apocalyptic number.

125306239 is a deficient number, since it is larger than the sum of its proper divisors (1).

125306239 is an equidigital number, since it uses as much as digits as its factorization.

125306239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 125306239 is about 11194.0269340394. The cubic root of 125306239 is about 500.4079856715.

It can be divided in two parts, 12530 and 6239, that added together give a square (18769 = 137²).

The spelling of 125306239 in words is "one hundred twenty-five million, three hundred six thousand, two hundred thirty-nine".