121172672 has 28 divisors (see below), whose sum is σ = 248747280. Its totient is φ = 58496256.

The previous prime is 121172659. The next prime is 121172677. The reversal of 121172672 is 276271121.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (121172677) 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 3 ways as a sum of consecutive naturals, for example, 30788 + ... + 34499.

Almost surely, 2^121172672 is an apocalyptic number.

It is an amenable number.

121172672 is an abundant number, since it is smaller than the sum of its proper divisors (127574608).

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

121172672 is an equidigital number, since it uses as much as digits as its factorization.

121172672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65328 (or 65318 counting only the distinct ones).

The product of its digits is 2352, while the sum is 29.

The square root of 121172672 is about 11007.8459291544. The cubic root of 121172672 is about 494.8439082030.

The spelling of 121172672 in words is "one hundred twenty-one million, one hundred seventy-two thousand, six hundred seventy-two".