1272279 has 4 divisors (see below), whose sum is σ = 1696376. Its totient is φ = 848184.

The previous prime is 1272269. The next prime is 1272281. The reversal of 1272279 is 9722721.

It is a happy number.

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

It is not a de Polignac number, because 1272279 - 2⁵ = 1272247 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212044 + ... + 212049.

It is an arithmetic number, because the mean of its divisors is an integer number (424094).

2^1272279 is an apocalyptic number.

1272279 is a deficient number, since it is larger than the sum of its proper divisors (424097).

1272279 is an equidigital number, since it uses as much as digits as its factorization.

1272279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424096.

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

The square root of 1272279 is about 1127.9534564866. The cubic root of 1272279 is about 108.3579515387.

It can be divided in two parts, 1272 and 279, that added together give a palindrome (1551).

The spelling of 1272279 in words is "one million, two hundred seventy-two thousand, two hundred seventy-nine".