1242279 has 12 divisors (see below), whose sum is σ = 1814176. Its totient is φ = 819072.

The previous prime is 1242271. The next prime is 1242289. The reversal of 1242279 is 9722421.

It is not a de Polignac number, because 1242279 - 2³ = 1242271 is a prime.

It is a super-2 number, since 2×1242279² = 3086514227682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162 + ... + 1584.

2^1242279 is an apocalyptic number.

1242279 is a deficient number, since it is larger than the sum of its proper divisors (571897).

1242279 is a wasteful number, since it uses less digits than its factorization.

1242279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526 (or 1523 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 1242279 is about 1114.5757040237. The cubic root of 1242279 is about 107.4994844035.

It can be divided in two parts, 1242 and 279, that added together give a square (1521 = 39²).

The spelling of 1242279 in words is "one million, two hundred forty-two thousand, two hundred seventy-nine".