125231665 has 32 divisors (see below), whose sum is σ = 170102016. Its totient is φ = 87816960.

The previous prime is 125231663. The next prime is 125231683. The reversal of 125231665 is 566132521.

It is not a de Polignac number, because 125231665 - 2¹ = 125231663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125231663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315247 + ... + 315643.

It is an arithmetic number, because the mean of its divisors is an integer number (5315688).

Almost surely, 2^125231665 is an apocalyptic number.

It is an amenable number.

125231665 is a deficient number, since it is larger than the sum of its proper divisors (44870351).

125231665 is a wasteful number, since it uses less digits than its factorization.

125231665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its digits is 10800, while the sum is 31.

The square root of 125231665 is about 11190.6954654302. The cubic root of 125231665 is about 500.3086960410.

The spelling of 125231665 in words is "one hundred twenty-five million, two hundred thirty-one thousand, six hundred sixty-five".