121688624 has 40 divisors (see below), whose sum is σ = 244276032. Its totient is φ = 58685760.

The previous prime is 121688603. The next prime is 121688627. The reversal of 121688624 is 426886121.

It is a happy number.

It is a super-2 number, since 2×121688624² = 29616242422026752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121688627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56039 + ... + 58169.

Almost surely, 2^121688624 is an apocalyptic number.

It is an amenable number.

121688624 is an abundant number, since it is smaller than the sum of its proper divisors (122587408).

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

121688624 is a wasteful number, since it uses less digits than its factorization.

121688624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265 (or 2259 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 121688624 is about 11031.2566827175. The cubic root of 121688624 is about 495.5452604619.

The spelling of 121688624 in words is "one hundred twenty-one million, six hundred eighty-eight thousand, six hundred twenty-four".