121506424 has 64 divisors (see below), whose sum is σ = 259660800. Its totient is φ = 52880256.

The previous prime is 121506419. The next prime is 121506457. The reversal of 121506424 is 424605121.

It is a happy number.

It is a super-2 number, since 2×121506424² = 29527622146535552, which contains 22 as substring.

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, 188647 + ... + 189289.

It is an arithmetic number, because the mean of its divisors is an integer number (4057200).

Almost surely, 2^121506424 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 121506424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129830400).

121506424 is an abundant number, since it is smaller than the sum of its proper divisors (138154376).

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

121506424 is a wasteful number, since it uses less digits than its factorization.

121506424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 121506424 is about 11022.9952372302. The cubic root of 121506424 is about 495.2978162259.

The spelling of 121506424 in words is "one hundred twenty-one million, five hundred six thousand, four hundred twenty-four".