1264808137 has 2 divisors, whose sum is σ = 1264808138. Its totient is φ = 1264808136.

The previous prime is 1264808119. The next prime is 1264808161. The reversal of 1264808137 is 7318084621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1198613641 + 66194496 = 34621^2 + 8136^2 .

It is an emirp because it is prime and its reverse (7318084621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264808137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1264808137.

It is not a weakly prime, because it can be changed into another prime (1264808197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632404068 + 632404069.

It is an arithmetic number, because the mean of its divisors is an integer number (632404069).

Almost surely, 2^1264808137 is an apocalyptic number.

It is an amenable number.

1264808137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264808137 is an equidigital number, since it uses as much as digits as its factorization.

1264808137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 1264808137 is about 35564.1411677549. The cubic root of 1264808137 is about 1081.4544125230.

The spelling of 1264808137 in words is "one billion, two hundred sixty-four million, eight hundred eight thousand, one hundred thirty-seven".