260042581 has 2 divisors, whose sum is σ = 260042582. Its totient is φ = 260042580.

The previous prime is 260042551. The next prime is 260042593. The reversal of 260042581 is 185240062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200675556 + 59367025 = 14166^2 + 7705^2 .

It is a cyclic number.

It is not a de Polignac number, because 260042581 - 2²⁵ = 226488149 is a prime.

It is a super-2 number, since 2×260042581² = 135244287866283122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260042521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130021290 + 130021291.

It is an arithmetic number, because the mean of its divisors is an integer number (130021291).

Almost surely, 2^260042581 is an apocalyptic number.

It is an amenable number.

260042581 is a deficient number, since it is larger than the sum of its proper divisors (1).

260042581 is an equidigital number, since it uses as much as digits as its factorization.

260042581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 260042581 is about 16125.8358232992. The cubic root of 260042581 is about 638.2852707296.

The spelling of 260042581 in words is "two hundred sixty million, forty-two thousand, five hundred eighty-one".