1275666 has 24 divisors (see below), whose sum is σ = 2968560. Its totient is φ = 364392.

The previous prime is 1275661. The next prime is 1275667. The reversal of 1275666 is 6665721.

It is not an unprimeable number, because it can be changed into a prime (1275661) 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 11 ways as a sum of consecutive naturals, for example, 1876 + ... + 2463.

It is an arithmetic number, because the mean of its divisors is an integer number (123690).

2^1275666 is an apocalyptic number.

1275666 is an abundant number, since it is smaller than the sum of its proper divisors (1692894).

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

1275666 is a wasteful number, since it uses less digits than its factorization.

1275666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358 (or 4351 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 1275666 is about 1129.4538503188. The cubic root of 1275666 is about 108.4540214482.

The spelling of 1275666 in words is "one million, two hundred seventy-five thousand, six hundred sixty-six".