1264857 has 8 divisors (see below), whose sum is σ = 1839840. Its totient is φ = 766560.

The previous prime is 1264853. The next prime is 1264859. The reversal of 1264857 is 7584621.

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

It is not a de Polignac number, because 1264857 - 2² = 1264853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 38329 = 1264857 / (1 + 2 + 6 + 4 + 8 + 5 + 7).

1264857 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1264853) 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, 19132 + ... + 19197.

It is an arithmetic number, because the mean of its divisors is an integer number (229980).

2^1264857 is an apocalyptic number.

It is an amenable number.

1264857 is a deficient number, since it is larger than the sum of its proper divisors (574983).

1264857 is a wasteful number, since it uses less digits than its factorization.

1264857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38343.

The product of its digits is 13440, while the sum is 33.

The square root of 1264857 is about 1124.6586148694. The cubic root of 1264857 is about 108.1468338858.

The spelling of 1264857 in words is "one million, two hundred sixty-four thousand, eight hundred fifty-seven".