121792780 has 12 divisors (see below), whose sum is σ = 255764880. Its totient is φ = 48717104.

The previous prime is 121792771. The next prime is 121792817. The reversal of 121792780 is 87297121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3044800 + ... + 3044839.

It is an arithmetic number, because the mean of its divisors is an integer number (21313740).

Almost surely, 2^121792780 is an apocalyptic number.

121792780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121792780 is an abundant number, since it is smaller than the sum of its proper divisors (133972100).

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

121792780 is a wasteful number, since it uses less digits than its factorization.

121792780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6089648 (or 6089646 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 121792780 is about 11035.9766219397. The cubic root of 121792780 is about 495.6866028805.

The spelling of 121792780 in words is "one hundred twenty-one million, seven hundred ninety-two thousand, seven hundred eighty".