1264220311 has 2 divisors, whose sum is σ = 1264220312. Its totient is φ = 1264220310.

The previous prime is 1264220291. The next prime is 1264220341. The reversal of 1264220311 is 1130224621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1264220311 - 2⁹ = 1264219799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264220341) 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, 632110155 + 632110156.

It is an arithmetic number, because the mean of its divisors is an integer number (632110156).

Almost surely, 2^1264220311 is an apocalyptic number.

1264220311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264220311 is an equidigital number, since it uses as much as digits as its factorization.

1264220311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1264220311 is about 35555.8758997722. The cubic root of 1264220311 is about 1081.2868494196.

Adding to 1264220311 its reverse (1130224621), we get a palindrome (2394444932).

The spelling of 1264220311 in words is "one billion, two hundred sixty-four million, two hundred twenty thousand, three hundred eleven".