125149661 has 16 divisors (see below), whose sum is σ = 155481984. Its totient is φ = 98086464.

The previous prime is 125149643. The next prime is 125149709. The reversal of 125149661 is 166941521.

It is not a de Polignac number, because 125149661 - 2²⁶ = 58040797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125149361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3311 + ... + 16163.

It is an arithmetic number, because the mean of its divisors is an integer number (9717624).

Almost surely, 2^125149661 is an apocalyptic number.

It is an amenable number.

125149661 is a deficient number, since it is larger than the sum of its proper divisors (30332323).

125149661 is a wasteful number, since it uses less digits than its factorization.

125149661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12980.

The product of its digits is 12960, while the sum is 35.

The square root of 125149661 is about 11187.0309287138. The cubic root of 125149661 is about 500.1994684141.

The spelling of 125149661 in words is "one hundred twenty-five million, one hundred forty-nine thousand, six hundred sixty-one".