125907689 has 4 divisors (see below), whose sum is σ = 128586624. Its totient is φ = 123228756.

The previous prime is 125907671. The next prime is 125907713. The reversal of 125907689 is 986709521.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125907689 is a prime.

It is a super-2 number, since 2×125907689² = 31705492298641442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 2678887 = 125907689 / (1 + 2 + 5 + 9 + 0 + 7 + 6 + 8 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125907619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1339397 + ... + 1339490.

It is an arithmetic number, because the mean of its divisors is an integer number (32146656).

Almost surely, 2^125907689 is an apocalyptic number.

It is an amenable number.

125907689 is a deficient number, since it is larger than the sum of its proper divisors (2678935).

125907689 is an equidigital number, since it uses as much as digits as its factorization.

125907689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678934.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 125907689 is about 11220.8595481808. The cubic root of 125907689 is about 501.2073343411.

The spelling of 125907689 in words is "one hundred twenty-five million, nine hundred seven thousand, six hundred eighty-nine".