1280299 has 4 divisors (see below), whose sum is σ = 1282960. Its totient is φ = 1277640.

The previous prime is 1280297. The next prime is 1280309. The reversal of 1280299 is 9920821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1280299 - 2¹ = 1280297 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1280299.

It is not an unprimeable number, because it can be changed into a prime (1280291) 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, 384 + ... + 1645.

It is an arithmetic number, because the mean of its divisors is an integer number (320740).

2^1280299 is an apocalyptic number.

1280299 is a deficient number, since it is larger than the sum of its proper divisors (2661).

1280299 is an equidigital number, since it uses as much as digits as its factorization.

1280299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1280299 is about 1131.5029827623. The cubic root of 1280299 is about 108.5851582855.

The spelling of 1280299 in words is "one million, two hundred eighty thousand, two hundred ninety-nine".