124991091 has 6 divisors (see below), whose sum is σ = 180542700. Its totient is φ = 83327388.

The previous prime is 124991081. The next prime is 124991093. The reversal of 124991091 is 190199421.

It is not a de Polignac number, because 124991091 - 2⁷ = 124990963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124991093) 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 5 ways as a sum of consecutive naturals, for example, 6943941 + ... + 6943958.

It is an arithmetic number, because the mean of its divisors is an integer number (30090450).

Almost surely, 2^124991091 is an apocalyptic number.

124991091 is a deficient number, since it is larger than the sum of its proper divisors (55551609).

124991091 is a wasteful number, since it uses less digits than its factorization.

124991091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13887905 (or 13887902 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 124991091 is about 11179.9414578074. The cubic root of 124991091 is about 499.9881210511.

The spelling of 124991091 in words is "one hundred twenty-four million, nine hundred ninety-one thousand, ninety-one".