1264423209 has 8 divisors (see below), whose sum is σ = 1926740160. Its totient is φ = 722527536.

The previous prime is 1264423169. The next prime is 1264423219. The reversal of 1264423209 is 9023244621.

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

It is not a de Polignac number, because 1264423209 - 2²⁹ = 727552297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1264423209.

It is not an unprimeable number, because it can be changed into a prime (1264423219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30105294 + ... + 30105335.

It is an arithmetic number, because the mean of its divisors is an integer number (240842520).

Almost surely, 2^1264423209 is an apocalyptic number.

It is an amenable number.

1264423209 is a deficient number, since it is larger than the sum of its proper divisors (662316951).

1264423209 is an equidigital number, since it uses as much as digits as its factorization.

1264423209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60210639.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 1264423209 is about 35558.7290127192. The cubic root of 1264423209 is about 1081.3446925032.

It can be divided in two parts, 12644 and 23209, that added together give a palindrome (35853).

The spelling of 1264423209 in words is "one billion, two hundred sixty-four million, four hundred twenty-three thousand, two hundred nine".