125657765 has 8 divisors (see below), whose sum is σ = 152484120. Its totient is φ = 99396352.

The previous prime is 125657731. The next prime is 125657789. The reversal of 125657765 is 567756521.

It can be written as a sum of positive squares in 4 ways, for example, as 195364 + 125462401 = 442^2 + 11201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125657765 - 2⁸ = 125657509 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140744 + ... + 141633.

It is an arithmetic number, because the mean of its divisors is an integer number (19060515).

Almost surely, 2^125657765 is an apocalyptic number.

It is an amenable number.

125657765 is a deficient number, since it is larger than the sum of its proper divisors (26826355).

125657765 is an equidigital number, since it uses as much as digits as its factorization.

125657765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282471.

The product of its digits is 441000, while the sum is 44.

The square root of 125657765 is about 11209.7174362247. The cubic root of 125657765 is about 500.8754861533.

The spelling of 125657765 in words is "one hundred twenty-five million, six hundred fifty-seven thousand, seven hundred sixty-five".