1264855 has 4 divisors (see below), whose sum is σ = 1517832. Its totient is φ = 1011880.

The previous prime is 1264853. The next prime is 1264859. The reversal of 1264855 is 5584621.

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

It is not a de Polignac number, because 1264855 - 2¹ = 1264853 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 not an unprimeable number, because it can be changed into a prime (1264853) 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, 126481 + ... + 126490.

It is an arithmetic number, because the mean of its divisors is an integer number (379458).

2^1264855 is an apocalyptic number.

1264855 is a deficient number, since it is larger than the sum of its proper divisors (252977).

1264855 is an equidigital number, since it uses as much as digits as its factorization.

1264855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252976.

The product of its digits is 9600, while the sum is 31.

The square root of 1264855 is about 1124.6577257104. The cubic root of 1264855 is about 108.1467768850.

The spelling of 1264855 in words is "one million, two hundred sixty-four thousand, eight hundred fifty-five".