124947840 has 128 divisors (see below), whose sum is σ = 405388800. Its totient is φ = 32724992.

The previous prime is 124947833. The next prime is 124947847. The reversal of 124947840 is 48749421.

It is an interprime number because it is at equal distance from previous prime (124947833) and next prime (124947847).

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×124947840² = 31223925441331200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124947847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112729 + ... + 113831.

It is an arithmetic number, because the mean of its divisors is an integer number (3167100).

Almost surely, 2^124947840 is an apocalyptic number.

124947840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 124947840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202694400).

124947840 is an abundant number, since it is smaller than the sum of its proper divisors (280440960).

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

124947840 is a wasteful number, since it uses less digits than its factorization.

124947840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 124947840 is about 11178.0069779903. The cubic root of 124947840 is about 499.9304436576.

The spelling of 124947840 in words is "one hundred twenty-four million, nine hundred forty-seven thousand, eight hundred forty".