1285955263 has 2 divisors, whose sum is σ = 1285955264. Its totient is φ = 1285955262.

The previous prime is 1285955249. The next prime is 1285955311. The reversal of 1285955263 is 3625595821.

It is a weak prime.

It is an emirp because it is prime and its reverse (3625595821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1285955263 - 2²¹ = 1283858111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285955063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642977631 + 642977632.

It is an arithmetic number, because the mean of its divisors is an integer number (642977632).

Almost surely, 2^1285955263 is an apocalyptic number.

1285955263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285955263 is an equidigital number, since it uses as much as digits as its factorization.

1285955263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 46.

The square root of 1285955263 is about 35860.2183902999. The cubic root of 1285955263 is about 1087.4483034922.

The spelling of 1285955263 in words is "one billion, two hundred eighty-five million, nine hundred fifty-five thousand, two hundred sixty-three".