121615456 has 24 divisors (see below), whose sum is σ = 243359424. Its totient is φ = 59809920.

The previous prime is 121615453. The next prime is 121615457. The reversal of 121615456 is 654516121.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121615453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29200 + ... + 33103.

It is an arithmetic number, because the mean of its divisors is an integer number (10139976).

Almost surely, 2^121615456 is an apocalyptic number.

121615456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121615456 is an abundant number, since it is smaller than the sum of its proper divisors (121743968).

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

121615456 is an equidigital number, since it uses as much as digits as its factorization.

121615456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62374 (or 62366 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 121615456 is about 11027.9397894620. The cubic root of 121615456 is about 495.4459213349.

The spelling of 121615456 in words is "one hundred twenty-one million, six hundred fifteen thousand, four hundred fifty-six".