121479720 has 64 divisors (see below), whose sum is σ = 373343040. Its totient is φ = 31603200.

The previous prime is 121479719. The next prime is 121479727. The reversal of 121479720 is 27974121.

It is not an unprimeable number, because it can be changed into a prime (121479727) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7426 + ... + 17265.

It is an arithmetic number, because the mean of its divisors is an integer number (5833485).

Almost surely, 2^121479720 is an apocalyptic number.

121479720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121479720 is an abundant number, since it is smaller than the sum of its proper divisors (251863320).

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

121479720 is a wasteful number, since it uses less digits than its factorization.

121479720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24746 (or 24742 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 121479720 is about 11021.7838846532. The cubic root of 121479720 is about 495.2615289759.

The spelling of 121479720 in words is "one hundred twenty-one million, four hundred seventy-nine thousand, seven hundred twenty".