125546661 has 24 divisors (see below), whose sum is σ = 196058720. Its totient is φ = 77145696.

The previous prime is 125546611. The next prime is 125546669. The reversal of 125546661 is 166645521.

It is not a de Polignac number, because 125546661 - 2¹⁴ = 125530277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125546669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3595 + ... + 16248.

Almost surely, 2^125546661 is an apocalyptic number.

It is an amenable number.

125546661 is a deficient number, since it is larger than the sum of its proper divisors (70512059).

125546661 is a wasteful number, since it uses less digits than its factorization.

125546661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19905 (or 19902 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 125546661 is about 11204.7606400137. The cubic root of 125546661 is about 500.7278213714.

The spelling of 125546661 in words is "one hundred twenty-five million, five hundred forty-six thousand, six hundred sixty-one".