1279489 has 4 divisors (see below), whose sum is σ = 1286740. Its totient is φ = 1272240.

The previous prime is 1279483. The next prime is 1279493. The reversal of 1279489 is 9849721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 166464 + 1113025 = 408^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1279489 - 2⁵ = 1279457 is a prime.

It is a super-2 number, since 2×1279489² = 3274184202242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3354 + ... + 3715.

It is an arithmetic number, because the mean of its divisors is an integer number (321685).

2^1279489 is an apocalyptic number.

It is an amenable number.

1279489 is a deficient number, since it is larger than the sum of its proper divisors (7251).

1279489 is an equidigital number, since it uses as much as digits as its factorization.

1279489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7250.

The product of its digits is 36288, while the sum is 40.

The square root of 1279489 is about 1131.1449951266. The cubic root of 1279489 is about 108.5622541219.

The spelling of 1279489 in words is "one million, two hundred seventy-nine thousand, four hundred eighty-nine".