124121640 has 64 divisors (see below), whose sum is σ = 377107200. Its totient is φ = 32677632.

The previous prime is 124121633. The next prime is 124121651. The reversal of 124121640 is 46121421.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2934 + ... + 16026.

It is an arithmetic number, because the mean of its divisors is an integer number (5892300).

Almost surely, 2^124121640 is an apocalyptic number.

124121640 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 124121640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188553600).

124121640 is an abundant number, since it is smaller than the sum of its proper divisors (252985560).

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

124121640 is a wasteful number, since it uses less digits than its factorization.

124121640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13186 (or 13182 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 124121640 is about 11140.9891840895. The cubic root of 124121640 is about 498.8260994050.

The spelling of 124121640 in words is "one hundred twenty-four million, one hundred twenty-one thousand, six hundred forty".