125864691 has 8 divisors (see below), whose sum is σ = 168931584. Its totient is φ = 83353800.

The previous prime is 125864653. The next prime is 125864693. The reversal of 125864691 is 196468521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125864691 - 2²³ = 117476083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125864693) 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 7 ways as a sum of consecutive naturals, for example, 138471 + ... + 139376.

It is an arithmetic number, because the mean of its divisors is an integer number (21116448).

Almost surely, 2^125864691 is an apocalyptic number.

125864691 is a deficient number, since it is larger than the sum of its proper divisors (43066893).

125864691 is a wasteful number, since it uses less digits than its factorization.

125864691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278001.

The product of its digits is 103680, while the sum is 42.

The square root of 125864691 is about 11218.9433994472. The cubic root of 125864691 is about 501.1502730479.

The spelling of 125864691 in words is "one hundred twenty-five million, eight hundred sixty-four thousand, six hundred ninety-one".