260405851 has 2 divisors, whose sum is σ = 260405852. Its totient is φ = 260405850.

The previous prime is 260405843. The next prime is 260405857. The reversal of 260405851 is 158504062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260405851 - 2³ = 260405843 is a prime.

It is a super-2 number, since 2×260405851² = 135622414470068402, which contains 22 as substring.

It is equal to p_14216782 and since 260405851 and 14216782 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (260405857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130202925 + 130202926.

It is an arithmetic number, because the mean of its divisors is an integer number (130202926).

Almost surely, 2^260405851 is an apocalyptic number.

260405851 is a deficient number, since it is larger than the sum of its proper divisors (1).

260405851 is an equidigital number, since it uses as much as digits as its factorization.

260405851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 260405851 is about 16137.0954945430. The cubic root of 260405851 is about 638.5823528484.

The spelling of 260405851 in words is "two hundred sixty million, four hundred five thousand, eight hundred fifty-one".