25732081 has 2 divisors, whose sum is σ = 25732082. Its totient is φ = 25732080.

The previous prime is 25732079. The next prime is 25732121. The reversal of 25732081 is 18023752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22896225 + 2835856 = 4785^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 25732081 - 2¹ = 25732079 is a prime.

It is a super-2 number, since 2×25732081² = 1324279985181122, which contains 22 as substring.

Together with 25732079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25732981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12866040 + 12866041.

It is an arithmetic number, because the mean of its divisors is an integer number (12866041).

Almost surely, 2^25732081 is an apocalyptic number.

It is an amenable number.

25732081 is a deficient number, since it is larger than the sum of its proper divisors (1).

25732081 is an equidigital number, since it uses as much as digits as its factorization.

25732081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 25732081 is about 5072.6798637407. The cubic root of 25732081 is about 295.2285158434.

The spelling of 25732081 in words is "twenty-five million, seven hundred thirty-two thousand, eighty-one".