1279900 has 18 divisors (see below), whose sum is σ = 2777600. Its totient is φ = 511920.

The previous prime is 1279877. The next prime is 1279907. The reversal of 1279900 is 99721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6300 + ... + 6499.

2^1279900 is an apocalyptic number.

1279900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1279900 is an abundant number, since it is smaller than the sum of its proper divisors (1497700).

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

1279900 is a wasteful number, since it uses less digits than its factorization.

1279900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12813 (or 12806 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1279900 is about 1131.3266548615. The cubic root of 1279900 is about 108.5738770718.

The spelling of 1279900 in words is "one million, two hundred seventy-nine thousand, nine hundred".