7942217 has 4 divisors (see below), whose sum is σ = 7950096. Its totient is φ = 7934340.

The previous prime is 7942211. The next prime is 7942219. The reversal of 7942217 is 7122497.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7942217 - 2⁸ = 7941961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7942211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2159 + ... + 4532.

It is an arithmetic number, because the mean of its divisors is an integer number (1987524).

Almost surely, 2^7942217 is an apocalyptic number.

It is an amenable number.

7942217 is a deficient number, since it is larger than the sum of its proper divisors (7879).

7942217 is a wasteful number, since it uses less digits than its factorization.

7942217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7878.

The product of its digits is 7056, while the sum is 32.

The square root of 7942217 is about 2818.1939251939. The cubic root of 7942217 is about 199.5173109938.

The spelling of 7942217 in words is "seven million, nine hundred forty-two thousand, two hundred seventeen".