125525001 has 16 divisors (see below), whose sum is σ = 201344000. Its totient is φ = 67953168.

The previous prime is 125524981. The next prime is 125525027. The reversal of 125525001 is 100525521.

It is not a de Polignac number, because 125525001 - 2⁷ = 125524873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125521001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156901 + ... + 157698.

It is an arithmetic number, because the mean of its divisors is an integer number (12584000).

Almost surely, 2^125525001 is an apocalyptic number.

It is an amenable number.

125525001 is a deficient number, since it is larger than the sum of its proper divisors (75818999).

125525001 is a wasteful number, since it uses less digits than its factorization.

125525001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314628.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 125525001 is about 11203.7940448760. The cubic root of 125525001 is about 500.6990236099.

The spelling of 125525001 in words is "one hundred twenty-five million, five hundred twenty-five thousand, one".