121878072 has 48 divisors (see below), whose sum is σ = 331131840. Its totient is φ = 40497408.

The previous prime is 121878059. The next prime is 121878089. The reversal of 121878072 is 270878121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21753 + ... + 26775.

It is an arithmetic number, because the mean of its divisors is an integer number (6898580).

Almost surely, 2^121878072 is an apocalyptic number.

121878072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121878072 is an abundant number, since it is smaller than the sum of its proper divisors (209253768).

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

121878072 is a wasteful number, since it uses less digits than its factorization.

121878072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372 (or 5365 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 121878072 is about 11039.8402162350. The cubic root of 121878072 is about 495.8022863564.

The spelling of 121878072 in words is "one hundred twenty-one million, eight hundred seventy-eight thousand, seventy-two".