1279644 has 12 divisors (see below), whose sum is σ = 2985864. Its totient is φ = 426544.

The previous prime is 1279643. The next prime is 1279657. The reversal of 1279644 is 4469721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279643) 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, 53307 + ... + 53330.

It is an arithmetic number, because the mean of its divisors is an integer number (248822).

2^1279644 is an apocalyptic number.

It is an amenable number.

1279644 is an abundant number, since it is smaller than the sum of its proper divisors (1706220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279644 is a wasteful number, since it uses less digits than its factorization.

1279644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106644 (or 106642 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 1279644 is about 1131.2135076987. The cubic root of 1279644 is about 108.5666377651.

The spelling of 1279644 in words is "one million, two hundred seventy-nine thousand, six hundred forty-four".