25205242141 has 2 divisors, whose sum is σ = 25205242142. Its totient is φ = 25205242140.

The previous prime is 25205242133. The next prime is 25205242169. The reversal of 25205242141 is 14124250252.

It is a happy number.

It is an a-pointer prime, because the next prime (25205242169) can be obtained adding 25205242141 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23845845241 + 1359396900 = 154421^2 + 36870^2 .

It is a cyclic number.

It is not a de Polignac number, because 25205242141 - 2³ = 25205242133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25205242121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12602621070 + 12602621071.

It is an arithmetic number, because the mean of its divisors is an integer number (12602621071).

Almost surely, 2^25205242141 is an apocalyptic number.

It is an amenable number.

25205242141 is a deficient number, since it is larger than the sum of its proper divisors (1).

25205242141 is an equidigital number, since it uses as much as digits as its factorization.

25205242141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 25205242141 its reverse (14124250252), we get a palindrome (39329492393).

The spelling of 25205242141 in words is "twenty-five billion, two hundred five million, two hundred forty-two thousand, one hundred forty-one".