121937856 has 56 divisors (see below), whose sum is σ = 327477120. Its totient is φ = 40035072.

The previous prime is 121937833. The next prime is 121937861. The reversal of 121937856 is 658739121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8125 + ... + 17603.

Almost surely, 2^121937856 is an apocalyptic number.

121937856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121937856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163738560).

121937856 is an abundant number, since it is smaller than the sum of its proper divisors (205539264).

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

121937856 is an equidigital number, since it uses as much as digits as its factorization.

121937856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9561 (or 9551 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 121937856 is about 11042.5475321594. The cubic root of 121937856 is about 495.8833405832.

The spelling of 121937856 in words is "one hundred twenty-one million, nine hundred thirty-seven thousand, eight hundred fifty-six".