1279899 has 6 divisors (see below), whose sum is σ = 1848756. Its totient is φ = 853260.

The previous prime is 1279877. The next prime is 1279907. The reversal of 1279899 is 9989721.

It is not a de Polignac number, because 1279899 - 2⁸ = 1279643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1279819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71097 + ... + 71114.

It is an arithmetic number, because the mean of its divisors is an integer number (308126).

2^1279899 is an apocalyptic number.

1279899 is a deficient number, since it is larger than the sum of its proper divisors (568857).

1279899 is a wasteful number, since it uses less digits than its factorization.

1279899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142217 (or 142214 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 1279899 is about 1131.3262129024. The cubic root of 1279899 is about 108.5738487951.

The spelling of 1279899 in words is "one million, two hundred seventy-nine thousand, eight hundred ninety-nine".