25720841 has 2 divisors, whose sum is σ = 25720842. Its totient is φ = 25720840.

The previous prime is 25720823. The next prime is 25720853. The reversal of 25720841 is 14802752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22762441 + 2958400 = 4771^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 25720841 - 2⁶ = 25720777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25720801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12860420 + 12860421.

It is an arithmetic number, because the mean of its divisors is an integer number (12860421).

Almost surely, 2^25720841 is an apocalyptic number.

It is an amenable number.

25720841 is a deficient number, since it is larger than the sum of its proper divisors (1).

25720841 is an equidigital number, since it uses as much as digits as its factorization.

25720841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 25720841 is about 5071.5718470707. The cubic root of 25720841 is about 295.1855234429.

It can be divided in two parts, 257208 and 41, that multiplied together give a triangular number (10545528 = T₄₅₉₂).

The spelling of 25720841 in words is "twenty-five million, seven hundred twenty thousand, eight hundred forty-one".