1256095553 has 2 divisors, whose sum is σ = 1256095554. Its totient is φ = 1256095552.

The previous prime is 1256095501. The next prime is 1256095579. The reversal of 1256095553 is 3555906521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092434704 + 163660849 = 33052^2 + 12793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1256095553 - 2¹⁰ = 1256094529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1256095553.

It is not a weakly prime, because it can be changed into another prime (1256095153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628047776 + 628047777.

It is an arithmetic number, because the mean of its divisors is an integer number (628047777).

Almost surely, 2^1256095553 is an apocalyptic number.

It is an amenable number.

1256095553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256095553 is an equidigital number, since it uses as much as digits as its factorization.

1256095553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 202500, while the sum is 41.

The square root of 1256095553 is about 35441.4383596377. The cubic root of 1256095553 is about 1078.9655026029.

The spelling of 1256095553 in words is "one billion, two hundred fifty-six million, ninety-five thousand, five hundred fifty-three".