1255119191 has 2 divisors, whose sum is σ = 1255119192. Its totient is φ = 1255119190.

The previous prime is 1255119167. The next prime is 1255119193. The reversal of 1255119191 is 1919115521.

It is a strong prime.

It is an emirp because it is prime and its reverse (1919115521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1255119191 - 2²² = 1250924887 is a prime.

It is a Sophie Germain prime.

Together with 1255119193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255119193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627559595 + 627559596.

It is an arithmetic number, because the mean of its divisors is an integer number (627559596).

Almost surely, 2^1255119191 is an apocalyptic number.

1255119191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255119191 is an equidigital number, since it uses as much as digits as its factorization.

1255119191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 35.

The square root of 1255119191 is about 35427.6613820331. The cubic root of 1255119191 is about 1078.6858704834.

The spelling of 1255119191 in words is "one billion, two hundred fifty-five million, one hundred nineteen thousand, one hundred ninety-one".