7212939 has 4 divisors (see below), whose sum is σ = 9617256. Its totient is φ = 4808624.

The previous prime is 7212917. The next prime is 7212943. The reversal of 7212939 is 9392127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7212939 - 2¹⁶ = 7147403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7212979) 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, 1202154 + ... + 1202159.

It is an arithmetic number, because the mean of its divisors is an integer number (2404314).

Almost surely, 2^7212939 is an apocalyptic number.

7212939 is a deficient number, since it is larger than the sum of its proper divisors (2404317).

7212939 is a wasteful number, since it uses less digits than its factorization.

7212939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404316.

The product of its digits is 6804, while the sum is 33.

The square root of 7212939 is about 2685.6915310586. The cubic root of 7212939 is about 193.2134786922.

The spelling of 7212939 in words is "seven million, two hundred twelve thousand, nine hundred thirty-nine".