121256716 has 24 divisors (see below), whose sum is σ = 256779936. Its totient is φ = 48910080.

The previous prime is 121256671. The next prime is 121256719. The reversal of 121256716 is 617652121.

It is not an unprimeable number, because it can be changed into a prime (121256719) 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, 126895 + ... + 127846.

It is an arithmetic number, because the mean of its divisors is an integer number (10699164).

Almost surely, 2^121256716 is an apocalyptic number.

It is an amenable number.

121256716 is an abundant number, since it is smaller than the sum of its proper divisors (135523220).

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

121256716 is a wasteful number, since it uses less digits than its factorization.

121256716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254769 (or 254767 counting only the distinct ones).

The product of its digits is 5040, while the sum is 31.

The square root of 121256716 is about 11011.6627264006. The cubic root of 121256716 is about 494.9582878160.

The spelling of 121256716 in words is "one hundred twenty-one million, two hundred fifty-six thousand, seven hundred sixteen".