1260399 has 16 divisors (see below), whose sum is σ = 1963008. Its totient is φ = 704352.

The previous prime is 1260383. The next prime is 1260401. The reversal of 1260399 is 9930621.

It is not a de Polignac number, because 1260399 - 2⁴ = 1260383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260319) 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, 349 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (122688).

2^1260399 is an apocalyptic number.

1260399 is a deficient number, since it is larger than the sum of its proper divisors (702609).

1260399 is a wasteful number, since it uses less digits than its factorization.

1260399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1260399 is about 1122.6749306901. The cubic root of 1260399 is about 108.0196294910.

The spelling of 1260399 in words is "one million, two hundred sixty thousand, three hundred ninety-nine".