125684091 has 12 divisors (see below), whose sum is σ = 195508768. Its totient is φ = 77343984.

The previous prime is 125684089. The next prime is 125684093. The reversal of 125684091 is 190486521.

125684091 is a `hidden beast` number, since 1 + 2 + 568 + 4 + 0 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (125684089) and next prime (125684093).

It is not a de Polignac number, because 125684091 - 2¹ = 125684089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125684093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 536995 + ... + 537228.

Almost surely, 2^125684091 is an apocalyptic number.

125684091 is a deficient number, since it is larger than the sum of its proper divisors (69824677).

125684091 is a wasteful number, since it uses less digits than its factorization.

125684091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074242 (or 1074239 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 125684091 is about 11210.8916237737. The cubic root of 125684091 is about 500.9104624433.

The spelling of 125684091 in words is "one hundred twenty-five million, six hundred eighty-four thousand, ninety-one".