124942640 has 40 divisors (see below), whose sum is σ = 295265328. Its totient is φ = 49155840.

The previous prime is 124942637. The next prime is 124942669. The reversal of 124942640 is 46249421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×124942640² = 31221326580339200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 124942597 and 124942606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7922 + ... + 17681.

Almost surely, 2^124942640 is an apocalyptic number.

124942640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124942640 is an abundant number, since it is smaller than the sum of its proper divisors (170322688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

124942640 is a wasteful number, since it uses less digits than its factorization.

124942640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25677 (or 25671 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 124942640 is about 11177.7743759659. The cubic root of 124942640 is about 499.9235082986.

The spelling of 124942640 in words is "one hundred twenty-four million, nine hundred forty-two thousand, six hundred forty".