1275985 has 4 divisors (see below), whose sum is σ = 1531188. Its totient is φ = 1020784.

The previous prime is 1275979. The next prime is 1276001. The reversal of 1275985 is 5895721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 179776 + 1096209 = 424^2 + 1047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275985 - 2³ = 1275977 is a prime.

It is a Duffinian 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, 127594 + ... + 127603.

It is an arithmetic number, because the mean of its divisors is an integer number (382797).

2^1275985 is an apocalyptic number.

It is an amenable number.

1275985 is a deficient number, since it is larger than the sum of its proper divisors (255203).

1275985 is an equidigital number, since it uses as much as digits as its factorization.

1275985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255202.

The product of its digits is 25200, while the sum is 37.

The square root of 1275985 is about 1129.5950601875. The cubic root of 1275985 is about 108.4630608962.

The spelling of 1275985 in words is "one million, two hundred seventy-five thousand, nine hundred eighty-five".