1255405553 has 2 divisors, whose sum is σ = 1255405554. Its totient is φ = 1255405552.

The previous prime is 1255405537. The next prime is 1255405561. The reversal of 1255405553 is 3555045521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1031244769 + 224160784 = 32113^2 + 14972^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255405553 - 2⁴ = 1255405537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255405453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627702776 + 627702777.

It is an arithmetic number, because the mean of its divisors is an integer number (627702777).

Almost surely, 2^1255405553 is an apocalyptic number.

It is an amenable number.

1255405553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255405553 is an equidigital number, since it uses as much as digits as its factorization.

1255405553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75000, while the sum is 35.

The square root of 1255405553 is about 35431.7026545437. The cubic root of 1255405553 is about 1078.7679001840.

The spelling of 1255405553 in words is "one billion, two hundred fifty-five million, four hundred five thousand, five hundred fifty-three".