1256200871 has 2 divisors, whose sum is σ = 1256200872. Its totient is φ = 1256200870.

The previous prime is 1256200853. The next prime is 1256200901. The reversal of 1256200871 is 1780026521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1256200871 - 2⁶ = 1256200807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256200811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628100435 + 628100436.

It is an arithmetic number, because the mean of its divisors is an integer number (628100436).

Almost surely, 2^1256200871 is an apocalyptic number.

1256200871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256200871 is an equidigital number, since it uses as much as digits as its factorization.

1256200871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1256200871 is about 35442.9241316232. The cubic root of 1256200871 is about 1078.9956572391.

The spelling of 1256200871 in words is "one billion, two hundred fifty-six million, two hundred thousand, eight hundred seventy-one".