121420624 has 20 divisors (see below), whose sum is σ = 253349236. Its totient is φ = 56040192.

The previous prime is 121420603. The next prime is 121420661. The reversal of 121420624 is 426024121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10497600 + 110923024 = 3240^2 + 10532^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121420595 and 121420604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291669 + ... + 292084.

Almost surely, 2^121420624 is an apocalyptic number.

It is an amenable number.

121420624 is an abundant number, since it is smaller than the sum of its proper divisors (131928612).

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

121420624 is a wasteful number, since it uses less digits than its factorization.

121420624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583774 (or 583768 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 121420624 is about 11019.1026857907. The cubic root of 121420624 is about 495.1812063164.

Adding to 121420624 its reverse (426024121), we get a palindrome (547444745).

The spelling of 121420624 in words is "one hundred twenty-one million, four hundred twenty thousand, six hundred twenty-four".