1264729269 has 4 divisors (see below), whose sum is σ = 1686305696. Its totient is φ = 843152844.

The previous prime is 1264729261. The next prime is 1264729273. The reversal of 1264729269 is 9629274621.

1264729269 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1264729269 - 2³ = 1264729261 is a prime.

It is a super-2 number, since 2×1264729269² = 3199080247730548722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264729261) 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, 210788209 + ... + 210788214.

It is an arithmetic number, because the mean of its divisors is an integer number (421576424).

Almost surely, 2^1264729269 is an apocalyptic number.

It is an amenable number.

1264729269 is a deficient number, since it is larger than the sum of its proper divisors (421576427).

1264729269 is an equidigital number, since it uses as much as digits as its factorization.

1264729269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421576426.

The product of its digits is 653184, while the sum is 48.

The square root of 1264729269 is about 35563.0323369647. The cubic root of 1264729269 is about 1081.4319337725.

The spelling of 1264729269 in words is "one billion, two hundred sixty-four million, seven hundred twenty-nine thousand, two hundred sixty-nine".