7122279 has 8 divisors (see below), whose sum is σ = 9546352. Its totient is φ = 4723200.

The previous prime is 7122263. The next prime is 7122289. The reversal of 7122279 is 9722217.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7122279 - 2⁴ = 7122263 is a prime.

It is a Duffinian number.

7122279 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7122209) 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, 5572 + ... + 6729.

It is an arithmetic number, because the mean of its divisors is an integer number (1193294).

Almost surely, 2^7122279 is an apocalyptic number.

7122279 is a deficient number, since it is larger than the sum of its proper divisors (2424073).

7122279 is a wasteful number, since it uses less digits than its factorization.

7122279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12497.

The product of its digits is 3528, while the sum is 30.

The square root of 7122279 is about 2668.7598243379. The cubic root of 7122279 is about 192.4005580728.

The spelling of 7122279 in words is "seven million, one hundred twenty-two thousand, two hundred seventy-nine".