1255655281 has 2 divisors, whose sum is σ = 1255655282. Its totient is φ = 1255655280.

The previous prime is 1255655251. The next prime is 1255655329. The reversal of 1255655281 is 1825565521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680375056 + 575280225 = 26084^2 + 23985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255655281 - 2¹³ = 1255647089 is a prime.

It is a super-2 number, since 2×1255655281² = 3153340369406377922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1255655221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627827640 + 627827641.

It is an arithmetic number, because the mean of its divisors is an integer number (627827641).

Almost surely, 2^1255655281 is an apocalyptic number.

It is an amenable number.

1255655281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255655281 is an equidigital number, since it uses as much as digits as its factorization.

1255655281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120000, while the sum is 40.

The square root of 1255655281 is about 35435.2265549411. The cubic root of 1255655281 is about 1078.8394257263.

The spelling of 1255655281 in words is "one billion, two hundred fifty-five million, six hundred fifty-five thousand, two hundred eighty-one".