121438506 has 32 divisors (see below), whose sum is σ = 283484160. Its totient is φ = 33957936.

The previous prime is 121438469. The next prime is 121438517. The reversal of 121438506 is 605834121.

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, 28786 + ... + 32733.

It is an arithmetic number, because the mean of its divisors is an integer number (8858880).

Almost surely, 2^121438506 is an apocalyptic number.

121438506 is an abundant number, since it is smaller than the sum of its proper divisors (162045654).

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

121438506 is a wasteful number, since it uses less digits than its factorization.

121438506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61578.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 121438506 is about 11019.9140650007. The cubic root of 121438506 is about 495.2055140915.

The spelling of 121438506 in words is "one hundred twenty-one million, four hundred thirty-eight thousand, five hundred six".