25341821 has 2 divisors, whose sum is σ = 25341822. Its totient is φ = 25341820.

The previous prime is 25341803. The next prime is 25341847. The reversal of 25341821 is 12814352.

It is an a-pointer prime, because the next prime (25341847) can be obtained adding 25341821 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12880921 + 12460900 = 3589^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 25341821 - 2¹⁰ = 25340797 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25341881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12670910 + 12670911.

It is an arithmetic number, because the mean of its divisors is an integer number (12670911).

Almost surely, 2^25341821 is an apocalyptic number.

It is an amenable number.

25341821 is a deficient number, since it is larger than the sum of its proper divisors (1).

25341821 is an equidigital number, since it uses as much as digits as its factorization.

25341821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 25341821 is about 5034.0660504209. The cubic root of 25341821 is about 293.7284000415.

It can be divided in two parts, 25341 and 821, that added together give a palindrome (26162).

The spelling of 25341821 in words is "twenty-five million, three hundred forty-one thousand, eight hundred twenty-one".