125257439 has 2 divisors, whose sum is σ = 125257440. Its totient is φ = 125257438.

The previous prime is 125257421. The next prime is 125257463. The reversal of 125257439 is 934752521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125257439 - 2¹² = 125253343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125257499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62628719 + 62628720.

It is an arithmetic number, because the mean of its divisors is an integer number (62628720).

Almost surely, 2^125257439 is an apocalyptic number.

125257439 is a deficient number, since it is larger than the sum of its proper divisors (1).

125257439 is an equidigital number, since it uses as much as digits as its factorization.

125257439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 125257439 is about 11191.8469878747. The cubic root of 125257439 is about 500.3430166254.

The spelling of 125257439 in words is "one hundred twenty-five million, two hundred fifty-seven thousand, four hundred thirty-nine".