125696539 has 4 divisors (see below), whose sum is σ = 127757200. Its totient is φ = 123635880.

The previous prime is 125696513. The next prime is 125696551. The reversal of 125696539 is 935696521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935696521 = 3919 ⋅238759.

It is a cyclic number.

It is not a de Polignac number, because 125696539 - 2⁹ = 125696027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125696579) 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 in 3 ways as a sum of consecutive naturals, for example, 1030239 + ... + 1030360.

It is an arithmetic number, because the mean of its divisors is an integer number (31939300).

Almost surely, 2^125696539 is an apocalyptic number.

125696539 is a deficient number, since it is larger than the sum of its proper divisors (2060661).

125696539 is an equidigital number, since it uses as much as digits as its factorization.

125696539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060660.

The product of its digits is 437400, while the sum is 46.

The square root of 125696539 is about 11211.4467844253. The cubic root of 125696539 is about 500.9269989504.

The spelling of 125696539 in words is "one hundred twenty-five million, six hundred ninety-six thousand, five hundred thirty-nine".