1264660051 has 4 divisors (see below), whose sum is σ = 1265173912. Its totient is φ = 1264146192.

The previous prime is 1264660027. The next prime is 1264660063. The reversal of 1264660051 is 1500664621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1500664621 = 107 ⋅14024903.

It is a cyclic number.

It is not a de Polignac number, because 1264660051 - 2⁷ = 1264659923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1264659995 and 1264660022.

It is not an unprimeable number, because it can be changed into a prime (1264660151) 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, 253221 + ... + 258166.

It is an arithmetic number, because the mean of its divisors is an integer number (316293478).

Almost surely, 2^1264660051 is an apocalyptic number.

1264660051 is a deficient number, since it is larger than the sum of its proper divisors (513861).

1264660051 is an equidigital number, since it uses as much as digits as its factorization.

1264660051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513860.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1264660051 is about 35562.0591501673. The cubic root of 1264660051 is about 1081.4122046697.

The spelling of 1264660051 in words is "one billion, two hundred sixty-four million, six hundred sixty thousand, fifty-one".