25041721 has 2 divisors, whose sum is σ = 25041722. Its totient is φ = 25041720.

The previous prime is 25041661. The next prime is 25041727. The reversal of 25041721 is 12714052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 4791721 = 4500^2 + 2189^2 .

It is a cyclic number.

It is not a de Polignac number, because 25041721 - 2⁷ = 25041593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25041692 and 25041701.

It is not a weakly prime, because it can be changed into another prime (25041727) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12520860 + 12520861.

It is an arithmetic number, because the mean of its divisors is an integer number (12520861).

Almost surely, 2^25041721 is an apocalyptic number.

It is an amenable number.

25041721 is a deficient number, since it is larger than the sum of its proper divisors (1).

25041721 is an equidigital number, since it uses as much as digits as its factorization.

25041721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 25041721 is about 5004.1703608091. The cubic root of 25041721 is about 292.5643406808.

Adding to 25041721 its reverse (12714052), we get a palindrome (37755773).

It can be divided in two parts, 2504 and 1721, that added together give a square (4225 = 65²).

The spelling of 25041721 in words is "twenty-five million, forty-one thousand, seven hundred twenty-one".