1266645 has 8 divisors (see below), whose sum is σ = 2026656. Its totient is φ = 675536.

The previous prime is 1266631. The next prime is 1266677. The reversal of 1266645 is 5466621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266645 - 2⁸ = 1266389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42207 + ... + 42236.

It is an arithmetic number, because the mean of its divisors is an integer number (253332).

2^1266645 is an apocalyptic number.

1266645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266645 is a deficient number, since it is larger than the sum of its proper divisors (760011).

1266645 is an equidigital number, since it uses as much as digits as its factorization.

1266645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84451.

The product of its digits is 8640, while the sum is 30.

The square root of 1266645 is about 1125.4532420318. The cubic root of 1266645 is about 108.1977686282.

The spelling of 1266645 in words is "one million, two hundred sixty-six thousand, six hundred forty-five".