1264881 has 8 divisors (see below), whose sum is σ = 1693440. Its totient is φ = 839792.

The previous prime is 1264877. The next prime is 1264883. The reversal of 1264881 is 1884621.

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 1264881 - 2² = 1264877 is a prime.

It is a super-2 number, since 2×1264881² = 3199847888322, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1264883) 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 7 ways as a sum of consecutive naturals, for example, 160 + ... + 1598.

It is an arithmetic number, because the mean of its divisors is an integer number (211680).

2^1264881 is an apocalyptic number.

It is an amenable number.

1264881 is a deficient number, since it is larger than the sum of its proper divisors (428559).

1264881 is a wasteful number, since it uses less digits than its factorization.

1264881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735.

The product of its digits is 3072, while the sum is 30.

The square root of 1264881 is about 1124.6692847233. The cubic root of 1264881 is about 108.1475178914.

It can be divided in two parts, 1264 and 881, that added together give a triangular number (2145 = T₆₅).

The spelling of 1264881 in words is "one million, two hundred sixty-four thousand, eight hundred eighty-one".