121470978 has 16 divisors (see below), whose sum is σ = 246270816. Its totient is φ = 39935520.

The previous prime is 121470977. The next prime is 121470991. The reversal of 121470978 is 879074121.

It is not an unprimeable number, because it can be changed into a prime (121470977) 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, 138228 + ... + 139103.

It is an arithmetic number, because the mean of its divisors is an integer number (15391926).

Almost surely, 2^121470978 is an apocalyptic number.

121470978 is an abundant number, since it is smaller than the sum of its proper divisors (124799838).

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

121470978 is a wasteful number, since it uses less digits than its factorization.

121470978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277409.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 121470978 is about 11021.3872992469. The cubic root of 121470978 is about 495.2496485837.

The spelling of 121470978 in words is "one hundred twenty-one million, four hundred seventy thousand, nine hundred seventy-eight".