121913472 has 32 divisors (see below), whose sum is σ = 323833680. Its totient is φ = 40637696.

The previous prime is 121913437. The next prime is 121913489. The reversal of 121913472 is 274319121.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158358 + ... + 159125.

Almost surely, 2^121913472 is an apocalyptic number.

121913472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121913472 is an abundant number, since it is smaller than the sum of its proper divisors (201920208).

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

121913472 is an equidigital number, since it uses as much as digits as its factorization.

121913472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317500 (or 317488 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 121913472 is about 11041.4433839059. The cubic root of 121913472 is about 495.8502843313.

The spelling of 121913472 in words is "one hundred twenty-one million, nine hundred thirteen thousand, four hundred seventy-two".