25121441 has 2 divisors, whose sum is σ = 25121442. Its totient is φ = 25121440.

The previous prime is 25121419. The next prime is 25121443. The reversal of 25121441 is 14412152.

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., 24601600 + 519841 = 4960^2 + 721^2 .

It is a cyclic number.

It is not a de Polignac number, because 25121441 - 2¹⁴ = 25105057 is a prime.

It is a Sophie Germain prime.

Together with 25121443, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25121443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12560720 + 12560721.

It is an arithmetic number, because the mean of its divisors is an integer number (12560721).

Almost surely, 2^25121441 is an apocalyptic number.

It is an amenable number.

25121441 is a deficient number, since it is larger than the sum of its proper divisors (1).

25121441 is an equidigital number, since it uses as much as digits as its factorization.

25121441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 20.

The square root of 25121441 is about 5012.1293877952. The cubic root of 25121441 is about 292.8744701003.

Adding to 25121441 its reverse (14412152), we get a palindrome (39533593).

The spelling of 25121441 in words is "twenty-five million, one hundred twenty-one thousand, four hundred forty-one".