1264999 has 4 divisors (see below), whose sum is σ = 1267336. Its totient is φ = 1262664.

The previous prime is 1264997. The next prime is 1265029. The reversal of 1264999 is 9994621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1264999 - 2¹ = 1264997 is a prime.

It is a Duffinian number.

1264999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112 + ... + 1594.

It is an arithmetic number, because the mean of its divisors is an integer number (316834).

2^1264999 is an apocalyptic number.

1264999 is a deficient number, since it is larger than the sum of its proper divisors (2337).

1264999 is an equidigital number, since it uses as much as digits as its factorization.

1264999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

The product of its digits is 34992, while the sum is 40.

The square root of 1264999 is about 1124.7217433659. The cubic root of 1264999 is about 108.1508807928.

The spelling of 1264999 in words is "one million, two hundred sixty-four thousand, nine hundred ninety-nine".