12017279 has 4 divisors (see below), whose sum is σ = 12028776. Its totient is φ = 12005784.

The previous prime is 12017263. The next prime is 12017287. The reversal of 12017279 is 97271021.

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 12017279 - 2⁴ = 12017263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12017209) 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, 4004 + ... + 6329.

It is an arithmetic number, because the mean of its divisors is an integer number (3007194).

Almost surely, 2^12017279 is an apocalyptic number.

12017279 is a deficient number, since it is larger than the sum of its proper divisors (11497).

12017279 is a wasteful number, since it uses less digits than its factorization.

12017279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11496.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 12017279 is about 3466.5947268177. The cubic root of 12017279 is about 229.0526820183.

The spelling of 12017279 in words is "twelve million, seventeen thousand, two hundred seventy-nine".