121667418 has 36 divisors (see below), whose sum is σ = 270266334. Its totient is φ = 39556800.

The previous prime is 121667407. The next prime is 121667423. The reversal of 121667418 is 814766121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13860729 + 107806689 = 3723^2 + 10383^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28248 + ... + 32268.

Almost surely, 2^121667418 is an apocalyptic number.

121667418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121667418 is an abundant number, since it is smaller than the sum of its proper divisors (148598916).

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

121667418 is a wasteful number, since it uses less digits than its factorization.

121667418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111 (or 4067 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 121667418 is about 11030.2954629511. The cubic root of 121667418 is about 495.5164734838.

The spelling of 121667418 in words is "one hundred twenty-one million, six hundred sixty-seven thousand, four hundred eighteen".