124121240 has 32 divisors (see below), whose sum is σ = 281000880. Its totient is φ = 49341312.

The previous prime is 124121213. The next prime is 124121251. The reversal of 124121240 is 42121421.

It is a congruent number.

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, 2999 + ... + 16038.

Almost surely, 2^124121240 is an apocalyptic number.

124121240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

124121240 is an abundant number, since it is smaller than the sum of its proper divisors (156879640).

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

124121240 is a wasteful number, since it uses less digits than its factorization.

124121240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19211 (or 19207 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 124121240 is about 11140.9712323477. The cubic root of 124121240 is about 498.8255635580.

Adding to 124121240 its reverse (42121421), we get a palindrome (166242661).

The spelling of 124121240 in words is "one hundred twenty-four million, one hundred twenty-one thousand, two hundred forty".