1279400 has 24 divisors (see below), whose sum is σ = 2975070. Its totient is φ = 511680.

The previous prime is 1279361. The next prime is 1279417. The reversal of 1279400 is 49721.

It can be written as a sum of positive squares in 3 ways, for example, as 515524 + 763876 = 718^2 + 874^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2999 + ... + 3398.

2^1279400 is an apocalyptic number.

1279400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1279400 is an abundant number, since it is smaller than the sum of its proper divisors (1695670).

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

1279400 is a wasteful number, since it uses less digits than its factorization.

1279400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6413 (or 6404 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1279400 is about 1131.1056537742. The cubic root of 1279400 is about 108.5597369022.

The spelling of 1279400 in words is "one million, two hundred seventy-nine thousand, four hundred".