1268815 has 4 divisors (see below), whose sum is σ = 1522584. Its totient is φ = 1015048.

The previous prime is 1268807. The next prime is 1268843. The reversal of 1268815 is 5188621.

1268815 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

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 1268815 - 2³ = 1268807 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126877 + ... + 126886.

It is an arithmetic number, because the mean of its divisors is an integer number (380646).

2^1268815 is an apocalyptic number.

1268815 is a deficient number, since it is larger than the sum of its proper divisors (253769).

1268815 is an equidigital number, since it uses as much as digits as its factorization.

1268815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253768.

The product of its digits is 3840, while the sum is 31.

The square root of 1268815 is about 1126.4168855268. The cubic root of 1268815 is about 108.2595210545.

The spelling of 1268815 in words is "one million, two hundred sixty-eight thousand, eight hundred fifteen".