124398891 has 6 divisors (see below), whose sum is σ = 179687300. Its totient is φ = 82932588.

The previous prime is 124398889. The next prime is 124398899. The reversal of 124398891 is 198893421.

It is not a de Polignac number, because 124398891 - 2¹ = 124398889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124398899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6911041 + ... + 6911058.

Almost surely, 2^124398891 is an apocalyptic number.

124398891 is a deficient number, since it is larger than the sum of its proper divisors (55288409).

124398891 is a wasteful number, since it uses less digits than its factorization.

124398891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13822105 (or 13822102 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 124398891 is about 11153.4250793198. The cubic root of 124398891 is about 499.1972331539.

The spelling of 124398891 in words is "one hundred twenty-four million, three hundred ninety-eight thousand, eight hundred ninety-one".