125994681 has 24 divisors (see below), whose sum is σ = 196254240. Its totient is φ = 77630400.

The previous prime is 125994679. The next prime is 125994691. The reversal of 125994681 is 186499521.

125994681 is a `hidden beast` number, since 12 + 599 + 46 + 8 + 1 = 666.

It is not a de Polignac number, because 125994681 - 2¹ = 125994679 is a prime.

It is a super-2 number, since 2×125994681² = 31749319280583522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125994691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1975 + ... + 15996.

It is an arithmetic number, because the mean of its divisors is an integer number (8177260).

Almost surely, 2^125994681 is an apocalyptic number.

It is an amenable number.

125994681 is a deficient number, since it is larger than the sum of its proper divisors (70259559).

125994681 is a wasteful number, since it uses less digits than its factorization.

125994681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18037 (or 18034 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 125994681 is about 11224.7352307304. The cubic root of 125994681 is about 501.3227389708.

The spelling of 125994681 in words is "one hundred twenty-five million, nine hundred ninety-four thousand, six hundred eighty-one".