1275864 has 16 divisors (see below), whose sum is σ = 3189720. Its totient is φ = 425280.

The previous prime is 1275863. The next prime is 1275877. The reversal of 1275864 is 4685721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26557 + ... + 26604.

2^1275864 is an apocalyptic number.

It is an amenable number.

1275864 is an abundant number, since it is smaller than the sum of its proper divisors (1913856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275864 is a wasteful number, since it uses less digits than its factorization.

1275864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53170 (or 53166 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 1275864 is about 1129.5414999016. The cubic root of 1275864 is about 108.4596323175.

The spelling of 1275864 in words is "one million, two hundred seventy-five thousand, eight hundred sixty-four".