1255638299 has 2 divisors, whose sum is σ = 1255638300. Its totient is φ = 1255638298.

The previous prime is 1255638277. The next prime is 1255638301. The reversal of 1255638299 is 9928365521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255638299 is a prime.

It is a super-2 number, since 2×1255638299² = 3153255075831226802, which contains 22 as substring.

Together with 1255638301, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1255638269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627819149 + 627819150.

It is an arithmetic number, because the mean of its divisors is an integer number (627819150).

Almost surely, 2^1255638299 is an apocalyptic number.

1255638299 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255638299 is an equidigital number, since it uses as much as digits as its factorization.

1255638299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 50.

The square root of 1255638299 is about 35434.9869338201. The cubic root of 1255638299 is about 1078.8345621479.

The spelling of 1255638299 in words is "one billion, two hundred fifty-five million, six hundred thirty-eight thousand, two hundred ninety-nine".