125387665 has 32 divisors (see below), whose sum is σ = 174890016. Its totient is φ = 85463040.

The previous prime is 125387663. The next prime is 125387671. The reversal of 125387665 is 566783521.

It can be written as a sum of positive squares in 16 ways, for example, as 1577536 + 123810129 = 1256^2 + 11127^2 .

It is not a de Polignac number, because 125387665 - 2¹ = 125387663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125387663) 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, 57495 + ... + 59635.

It is an arithmetic number, because the mean of its divisors is an integer number (5465313).

Almost surely, 2^125387665 is an apocalyptic number.

It is an amenable number.

125387665 is a deficient number, since it is larger than the sum of its proper divisors (49502351).

125387665 is a wasteful number, since it uses less digits than its factorization.

125387665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229.

The product of its digits is 302400, while the sum is 43.

The square root of 125387665 is about 11197.6633723291. The cubic root of 125387665 is about 500.5163532418.

The spelling of 125387665 in words is "one hundred twenty-five million, three hundred eighty-seven thousand, six hundred sixty-five".