125238665 has 16 divisors (see below), whose sum is σ = 151985808. Its totient is φ = 99065856.

The previous prime is 125238653. The next prime is 125238683. The reversal of 125238665 is 566832521.

It can be written as a sum of positive squares in 8 ways, for example, as 40819321 + 84419344 = 6389^2 + 9188^2 .

It is a cyclic number.

It is not a de Polignac number, because 125238665 - 2⁶ = 125238601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224567 + ... + 225123.

It is an arithmetic number, because the mean of its divisors is an integer number (9499113).

Almost surely, 2^125238665 is an apocalyptic number.

It is an amenable number.

125238665 is a deficient number, since it is larger than the sum of its proper divisors (26747143).

125238665 is a wasteful number, since it uses less digits than its factorization.

125238665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

The product of its digits is 86400, while the sum is 38.

The square root of 125238665 is about 11191.0082208888. The cubic root of 125238665 is about 500.3180176866.

The spelling of 125238665 in words is "one hundred twenty-five million, two hundred thirty-eight thousand, six hundred sixty-five".