125649 has 12 divisors (see below), whose sum is σ = 189696. Its totient is φ = 79992.

The previous prime is 125641. The next prime is 125651. The reversal of 125649 is 946521.

125649 is a `hidden beast` number, since 12 + 5 + 649 = 666.

It is not a de Polignac number, because 125649 - 2³ = 125641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125641) 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, 97 + ... + 510.

It is an arithmetic number, because the mean of its divisors is an integer number (15808).

2¹²⁵⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

125649 is a deficient number, since it is larger than the sum of its proper divisors (64047).

125649 is a wasteful number, since it uses less digits than its factorization.

125649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 633 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 125649 is about 354.4700269416. The cubic root of 125649 is about 50.0863840035.

The spelling of 125649 in words is "one hundred twenty-five thousand, six hundred forty-nine".