1222579 has 4 divisors (see below), whose sum is σ = 1252440. Its totient is φ = 1192720.

The previous prime is 1222567. The next prime is 1222583. The reversal of 1222579 is 9752221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222579 is a prime.

It is a super-2 number, since 2×1222579² = 2989398822482, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1222279) 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, 14869 + ... + 14950.

It is an arithmetic number, because the mean of its divisors is an integer number (313110).

2^1222579 is an apocalyptic number.

1222579 is a deficient number, since it is larger than the sum of its proper divisors (29861).

1222579 is an equidigital number, since it uses as much as digits as its factorization.

1222579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29860.

The product of its digits is 2520, while the sum is 28.

The square root of 1222579 is about 1105.7029438326. The cubic root of 1222579 is about 106.9282134147.

It can be divided in two parts, 122 and 2579, that added together give a triangular number (2701 = T₇₃).

The spelling of 1222579 in words is "one million, two hundred twenty-two thousand, five hundred seventy-nine".