1264221367 has 2 divisors, whose sum is σ = 1264221368. Its totient is φ = 1264221366.

The previous prime is 1264221353. The next prime is 1264221383. The reversal of 1264221367 is 7631224621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1264221367 - 2¹⁵ = 1264188599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264221307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632110683 + 632110684.

It is an arithmetic number, because the mean of its divisors is an integer number (632110684).

Almost surely, 2^1264221367 is an apocalyptic number.

1264221367 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264221367 is an equidigital number, since it uses as much as digits as its factorization.

1264221367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 1264221367 is about 35555.8907496353. The cubic root of 1264221367 is about 1081.2871504849.

Adding to 1264221367 its reverse (7631224621), we get a palindrome (8895445988).

The spelling of 1264221367 in words is "one billion, two hundred sixty-four million, two hundred twenty-one thousand, three hundred sixty-seven".