1255622197 has 2 divisors, whose sum is σ = 1255622198. Its totient is φ = 1255622196.

The previous prime is 1255622191. The next prime is 1255622237. The reversal of 1255622197 is 7912265521.

It is a happy number.

It is an a-pointer prime, because the next prime (1255622237) can be obtained adding 1255622197 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1249905316 + 5716881 = 35354^2 + 2391^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255622197 - 2¹⁵ = 1255589429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255622191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627811098 + 627811099.

It is an arithmetic number, because the mean of its divisors is an integer number (627811099).

Almost surely, 2^1255622197 is an apocalyptic number.

It is an amenable number.

1255622197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255622197 is an equidigital number, since it uses as much as digits as its factorization.

1255622197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 40.

The square root of 1255622197 is about 35434.7597282668. The cubic root of 1255622197 is about 1078.8299505575.

The spelling of 1255622197 in words is "one billion, two hundred fifty-five million, six hundred twenty-two thousand, one hundred ninety-seven".