1265879 has 4 divisors (see below), whose sum is σ = 1309560. Its totient is φ = 1222200.

The previous prime is 1265867. The next prime is 1265899. The reversal of 1265879 is 9785621.

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 1265879 - 2⁴ = 1265863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265899) 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 3 ways as a sum of consecutive naturals, for example, 21797 + ... + 21854.

It is an arithmetic number, because the mean of its divisors is an integer number (327390).

2^1265879 is an apocalyptic number.

1265879 is a deficient number, since it is larger than the sum of its proper divisors (43681).

1265879 is an equidigital number, since it uses as much as digits as its factorization.

1265879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43680.

The product of its digits is 30240, while the sum is 38.

The square root of 1265879 is about 1125.1128832255. The cubic root of 1265879 is about 108.1759534647.

The spelling of 1265879 in words is "one million, two hundred sixty-five thousand, eight hundred seventy-nine".