1255527397 has 2 divisors, whose sum is σ = 1255527398. Its totient is φ = 1255527396.

The previous prime is 1255527349. The next prime is 1255527409. The reversal of 1255527397 is 7937255521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1013849281 + 241678116 = 31841^2 + 15546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255527397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255527347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627763698 + 627763699.

It is an arithmetic number, because the mean of its divisors is an integer number (627763699).

Almost surely, 2^1255527397 is an apocalyptic number.

It is an amenable number.

1255527397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255527397 is an equidigital number, since it uses as much as digits as its factorization.

1255527397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 661500, while the sum is 46.

The square root of 1255527397 is about 35433.4220334418. The cubic root of 1255527397 is about 1078.8027991704.

The spelling of 1255527397 in words is "one billion, two hundred fifty-five million, five hundred twenty-seven thousand, three hundred ninety-seven".