125101665 has 40 divisors (see below), whose sum is σ = 241516968. Its totient is φ = 61585920.

The previous prime is 125101649. The next prime is 125101673. The reversal of 125101665 is 566101521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2954961 + 122146704 = 1719^2 + 11052^2 .

It is not a de Polignac number, because 125101665 - 2⁴ = 125101649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6616 + ... + 17145.

Almost surely, 2^125101665 is an apocalyptic number.

125101665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125101665 is a deficient number, since it is larger than the sum of its proper divisors (116415303).

125101665 is a wasteful number, since it uses less digits than its factorization.

125101665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23791 (or 23782 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 125101665 is about 11184.8855604338. The cubic root of 125101665 is about 500.1355166005.

The spelling of 125101665 in words is "one hundred twenty-five million, one hundred one thousand, six hundred sixty-five".