7116921 has 12 divisors (see below), whose sum is σ = 11748672. Its totient is φ = 4066776.

The previous prime is 7116911. The next prime is 7116943. The reversal of 7116921 is 1296117.

It is not a de Polignac number, because 7116921 - 2⁹ = 7116409 is a prime.

7116921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7116911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56421 + ... + 56546.

It is an arithmetic number, because the mean of its divisors is an integer number (979056).

Almost surely, 2^7116921 is an apocalyptic number.

It is an amenable number.

7116921 is a deficient number, since it is larger than the sum of its proper divisors (4631751).

7116921 is a wasteful number, since it uses less digits than its factorization.

7116921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112980 (or 112977 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 7116921 is about 2667.7557984193. The cubic root of 7116921 is about 192.3522991375.

The spelling of 7116921 in words is "seven million, one hundred sixteen thousand, nine hundred twenty-one".