1272439 has 4 divisors (see below), whose sum is σ = 1454224. Its totient is φ = 1090656.

The previous prime is 1272421. The next prime is 1272443. The reversal of 1272439 is 9342721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9342721 = 257 ⋅36353.

It is not a de Polignac number, because 1272439 - 2⁹ = 1271927 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 (1272409) 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, 90882 + ... + 90895.

It is an arithmetic number, because the mean of its divisors is an integer number (363556).

2^1272439 is an apocalyptic number.

1272439 is a deficient number, since it is larger than the sum of its proper divisors (181785).

1272439 is an equidigital number, since it uses as much as digits as its factorization.

1272439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181784.

The product of its digits is 3024, while the sum is 28.

The square root of 1272439 is about 1128.0243791692. The cubic root of 1272439 is about 108.3624936623.

It can be divided in two parts, 1272 and 439, that added together give a triangular number (1711 = T₅₈).

The spelling of 1272439 in words is "one million, two hundred seventy-two thousand, four hundred thirty-nine".