1264264121 has 2 divisors, whose sum is σ = 1264264122. Its totient is φ = 1264264120.

The previous prime is 1264264081. The next prime is 1264264219. The reversal of 1264264121 is 1214624621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646990096 + 617274025 = 25436^2 + 24845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264264121 - 2¹⁴ = 1264247737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1264764121) 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 as a sum of consecutive naturals, namely, 632132060 + 632132061.

It is an arithmetic number, because the mean of its divisors is an integer number (632132061).

Almost surely, 2^1264264121 is an apocalyptic number.

It is an amenable number.

1264264121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264264121 is an equidigital number, since it uses as much as digits as its factorization.

1264264121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

The square root of 1264264121 is about 35556.4919670093. The cubic root of 1264264121 is about 1081.2993394973.

Adding to 1264264121 its reverse (1214624621), we get a palindrome (2478888742).

The spelling of 1264264121 in words is "one billion, two hundred sixty-four million, two hundred sixty-four thousand, one hundred twenty-one".