125856261 has 12 divisors (see below), whose sum is σ = 188525792. Its totient is φ = 83904012.

The previous prime is 125856257. The next prime is 125856281. The reversal of 125856261 is 162658521.

125856261 is a `hidden beast` number, since 1 + 25 + 8 + 5 + 626 + 1 = 666.

It is not a de Polignac number, because 125856261 - 2² = 125856257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125856251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258721 + ... + 259206.

Almost surely, 2^125856261 is an apocalyptic number.

It is an amenable number.

125856261 is a deficient number, since it is larger than the sum of its proper divisors (62669531).

125856261 is an frugal number, since it uses more digits than its factorization.

125856261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517942 (or 517930 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 125856261 is about 11218.5676893265. The cubic root of 125856261 is about 501.1390843364.

The spelling of 125856261 in words is "one hundred twenty-five million, eight hundred fifty-six thousand, two hundred sixty-one".