121535424 has 112 divisors (see below), whose sum is σ = 363463840. Its totient is φ = 39813120.

The previous prime is 121535389. The next prime is 121535443. The reversal of 121535424 is 424535121.

121535424 is a `hidden beast` number, since 121 + 535 + 4 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent 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, 104832 + ... + 105984.

Almost surely, 2^121535424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121535424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181731920).

121535424 is an abundant number, since it is smaller than the sum of its proper divisors (241928416).

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

121535424 is a wasteful number, since it uses less digits than its factorization.

121535424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235 (or 1219 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 121535424 is about 11024.3105906900. The cubic root of 121535424 is about 495.3372174186.

The spelling of 121535424 in words is "one hundred twenty-one million, five hundred thirty-five thousand, four hundred twenty-four".