1264581 has 12 divisors (see below), whose sum is σ = 1853280. Its totient is φ = 830760.

The previous prime is 1264577. The next prime is 1264597. The reversal of 1264581 is 1854621.

1264581 is a `hidden beast` number, since 12 + 645 + 8 + 1 = 666.

It is not a de Polignac number, because 1264581 - 2² = 1264577 is a prime.

It is a super-2 number, since 2×1264581² = 3198330211122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264541) 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, 351 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (154440).

2^1264581 is an apocalyptic number.

It is an amenable number.

1264581 is a deficient number, since it is larger than the sum of its proper divisors (588699).

1264581 is a wasteful number, since it uses less digits than its factorization.

1264581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056 (or 2053 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1264581 is about 1124.5359042734. The cubic root of 1264581 is about 108.1389672001.

The spelling of 1264581 in words is "one million, two hundred sixty-four thousand, five hundred eighty-one".