1264393129 has 4 divisors (see below), whose sum is σ = 1266055380. Its totient is φ = 1262730880.

The previous prime is 1264393121. The next prime is 1264393159. The reversal of 1264393129 is 9213934621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 135769104 + 1128624025 = 11652^2 + 33595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264393129 - 2³ = 1264393121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1264393091 and 1264393100.

It is not an unprimeable number, because it can be changed into a prime (1264393121) 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, 829984 + ... + 831505.

It is an arithmetic number, because the mean of its divisors is an integer number (316513845).

Almost surely, 2^1264393129 is an apocalyptic number.

It is an amenable number.

1264393129 is a deficient number, since it is larger than the sum of its proper divisors (1662251).

1264393129 is an equidigital number, since it uses as much as digits as its factorization.

1264393129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662250.

The product of its digits is 69984, while the sum is 40.

The square root of 1264393129 is about 35558.3060479545. The cubic root of 1264393129 is about 1081.3361175509.

The spelling of 1264393129 in words is "one billion, two hundred sixty-four million, three hundred ninety-three thousand, one hundred twenty-nine".