121873920 has 160 divisors (see below), whose sum is σ = 445471488. Its totient is φ = 27844608.

The previous prime is 121873909. The next prime is 121873951. The reversal of 121873920 is 29378121.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52627 + ... + 54893.

Almost surely, 2^121873920 is an apocalyptic number.

121873920 is a gapful number since it is divisible by the number (10) 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 121873920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222735744).

121873920 is an abundant number, since it is smaller than the sum of its proper divisors (323597568).

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

121873920 is an equidigital number, since it uses as much as digits as its factorization.

121873920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300 (or 2284 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 121873920 is about 11039.6521684336. The cubic root of 121873920 is about 495.7966561545.

The spelling of 121873920 in words is "one hundred twenty-one million, eight hundred seventy-three thousand, nine hundred twenty".