25832581 has 2 divisors, whose sum is σ = 25832582. Its totient is φ = 25832580.

The previous prime is 25832567. The next prime is 25832603. The reversal of 25832581 is 18523852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18783556 + 7049025 = 4334^2 + 2655^2 .

It is a cyclic number.

It is not a de Polignac number, because 25832581 - 2¹⁹ = 25308293 is a prime.

It is a super-2 number, since 2×25832581² = 1334644482243122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25832531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12916290 + 12916291.

It is an arithmetic number, because the mean of its divisors is an integer number (12916291).

Almost surely, 2^25832581 is an apocalyptic number.

It is an amenable number.

25832581 is a deficient number, since it is larger than the sum of its proper divisors (1).

25832581 is an equidigital number, since it uses as much as digits as its factorization.

25832581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19200, while the sum is 34.

The square root of 25832581 is about 5082.5762168412. The cubic root of 25832581 is about 295.6123677123.

The spelling of 25832581 in words is "twenty-five million, eight hundred thirty-two thousand, five hundred eighty-one".