1277625263 has 2 divisors, whose sum is σ = 1277625264. Its totient is φ = 1277625262.

The previous prime is 1277625253. The next prime is 1277625277. The reversal of 1277625263 is 3625267721.

It is a weak prime.

It is an emirp because it is prime and its reverse (3625267721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1277625263 - 2¹⁴ = 1277608879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1277625263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277625253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638812631 + 638812632.

It is an arithmetic number, because the mean of its divisors is an integer number (638812632).

Almost surely, 2^1277625263 is an apocalyptic number.

1277625263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277625263 is an equidigital number, since it uses as much as digits as its factorization.

1277625263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 41.

The square root of 1277625263 is about 35743.8842740965. The cubic root of 1277625263 is about 1085.0951697191.

The spelling of 1277625263 in words is "one billion, two hundred seventy-seven million, six hundred twenty-five thousand, two hundred sixty-three".