25832561 has 2 divisors, whose sum is σ = 25832562. Its totient is φ = 25832560.

The previous prime is 25832557. The next prime is 25832567. The reversal of 25832561 is 16523852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25441936 + 390625 = 5044^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 25832561 - 2² = 25832557 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (25832567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12916280 + 12916281.

It is an arithmetic number, because the mean of its divisors is an integer number (12916281).

Almost surely, 2^25832561 is an apocalyptic number.

It is an amenable number.

25832561 is a deficient number, since it is larger than the sum of its proper divisors (1).

25832561 is an equidigital number, since it uses as much as digits as its factorization.

25832561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 32.

The square root of 25832561 is about 5082.5742493347. The cubic root of 25832561 is about 295.6122914230.

The spelling of 25832561 in words is "twenty-five million, eight hundred thirty-two thousand, five hundred sixty-one".