1255485851 has 2 divisors, whose sum is σ = 1255485852. Its totient is φ = 1255485850.

The previous prime is 1255485827. The next prime is 1255485877. The reversal of 1255485851 is 1585845521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1255485851 - 2⁶ = 1255485787 is a prime.

It is a super-2 number, since 2×1255485851² = 3152489444122388402, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1255485251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627742925 + 627742926.

It is an arithmetic number, because the mean of its divisors is an integer number (627742926).

Almost surely, 2^1255485851 is an apocalyptic number.

1255485851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255485851 is an equidigital number, since it uses as much as digits as its factorization.

1255485851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320000, while the sum is 44.

The square root of 1255485851 is about 35432.8357741799. The cubic root of 1255485851 is about 1078.7908996728.

The spelling of 1255485851 in words is "one billion, two hundred fifty-five million, four hundred eighty-five thousand, eight hundred fifty-one".