121273872 has 40 divisors (see below), whose sum is σ = 314396544. Its totient is φ = 40281984.

The previous prime is 121273847. The next prime is 121273877. The reversal of 121273872 is 278372121.

It is not an unprimeable number, because it can be changed into a prime (121273877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9753 + ... + 18375.

Almost surely, 2^121273872 is an apocalyptic number.

121273872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121273872 is an abundant number, since it is smaller than the sum of its proper divisors (193122672).

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

121273872 is a wasteful number, since it uses less digits than its factorization.

121273872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8927 (or 8921 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 121273872 is about 11012.4416911056. The cubic root of 121273872 is about 494.9816297641.

The spelling of 121273872 in words is "one hundred twenty-one million, two hundred seventy-three thousand, eight hundred seventy-two".