25358561 has 2 divisors, whose sum is σ = 25358562. Its totient is φ = 25358560.

The previous prime is 25358551. The next prime is 25358591. The reversal of 25358561 is 16585352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22619536 + 2739025 = 4756^2 + 1655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25358561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25358551) 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, 12679280 + 12679281.

It is an arithmetic number, because the mean of its divisors is an integer number (12679281).

Almost surely, 2^25358561 is an apocalyptic number.

It is an amenable number.

25358561 is a deficient number, since it is larger than the sum of its proper divisors (1).

25358561 is an equidigital number, since it uses as much as digits as its factorization.

25358561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 35.

The square root of 25358561 is about 5035.7284478018. The cubic root of 25358561 is about 293.7930616817.

The spelling of 25358561 in words is "twenty-five million, three hundred fifty-eight thousand, five hundred sixty-one".