1264320051 has 12 divisors (see below), whose sum is σ = 1762242888. Its totient is φ = 806232064.

The previous prime is 1264320037. The next prime is 1264320061. The reversal of 1264320051 is 1500234621.

It is not a de Polignac number, because 1264320051 - 2¹⁰ = 1264319027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264320011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 396750 + ... + 399923.

It is an arithmetic number, because the mean of its divisors is an integer number (146853574).

Almost surely, 2^1264320051 is an apocalyptic number.

1264320051 is a deficient number, since it is larger than the sum of its proper divisors (497922837).

1264320051 is an equidigital number, since it uses as much as digits as its factorization.

1264320051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796722 (or 796699 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1264320051 is about 35557.2784532225. The cubic root of 1264320051 is about 1081.3152845253.

Adding to 1264320051 its reverse (1500234621), we get a palindrome (2764554672).

The spelling of 1264320051 in words is "one billion, two hundred sixty-four million, three hundred twenty thousand, fifty-one".