1279421 has 16 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 1024320.

The previous prime is 1279417. The next prime is 1279427. The reversal of 1279421 is 1249721.

It is not a de Polignac number, because 1279421 - 2² = 1279417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3095 + ... + 3483.

It is an arithmetic number, because the mean of its divisors is an integer number (98280).

2^1279421 is an apocalyptic number.

1279421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1279421 is a deficient number, since it is larger than the sum of its proper divisors (293059).

1279421 is a wasteful number, since it uses less digits than its factorization.

1279421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436.

The product of its digits is 1008, while the sum is 26.

The square root of 1279421 is about 1131.1149366886. The cubic root of 1279421 is about 108.5603308634.

The spelling of 1279421 in words is "one million, two hundred seventy-nine thousand, four hundred twenty-one".