1264440347 has 4 divisors (see below), whose sum is σ = 1266308736. Its totient is φ = 1262571960.

The previous prime is 1264440337. The next prime is 1264440377. The reversal of 1264440347 is 7430444621.

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 1264440347 - 2⁶ = 1264440283 is a prime.

It is a super-2 number, since 2×1264440347² = 3197618782242960818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264440337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933179 + ... + 934532.

It is an arithmetic number, because the mean of its divisors is an integer number (316577184).

Almost surely, 2^1264440347 is an apocalyptic number.

1264440347 is a deficient number, since it is larger than the sum of its proper divisors (1868389).

1264440347 is an equidigital number, since it uses as much as digits as its factorization.

1264440347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868388.

The product of its (nonzero) digits is 64512, while the sum is 35.

The square root of 1264440347 is about 35558.9699935192. The cubic root of 1264440347 is about 1081.3495779987.

Adding to 1264440347 its reverse (7430444621), we get a palindrome (8694884968).

The spelling of 1264440347 in words is "one billion, two hundred sixty-four million, four hundred forty thousand, three hundred forty-seven".