124991560 has 32 divisors (see below), whose sum is σ = 283730040. Its totient is φ = 49552384.

The previous prime is 124991551. The next prime is 124991563. The reversal of 124991560 is 65199421.

It can be written as a sum of positive squares in 4 ways, for example, as 21399876 + 103591684 = 4626^2 + 10178^2 .

It is not an unprimeable number, because it can be changed into a prime (124991563) 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 7 ways as a sum of consecutive naturals, for example, 9307 + ... + 18346.

Almost surely, 2^124991560 is an apocalyptic number.

124991560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124991560 is an abundant number, since it is smaller than the sum of its proper divisors (158738480).

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

124991560 is a wasteful number, since it uses less digits than its factorization.

124991560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27777 (or 27773 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 124991560 is about 11179.9624328528. The cubic root of 124991560 is about 499.9887464134.

The spelling of 124991560 in words is "one hundred twenty-four million, nine hundred ninety-one thousand, five hundred sixty".