25448257 has 2 divisors, whose sum is σ = 25448258. Its totient is φ = 25448256.

The previous prime is 25448243. The next prime is 25448261. The reversal of 25448257 is 75284452.

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., 15968016 + 9480241 = 3996^2 + 3079^2 .

It is a cyclic number.

It is not a de Polignac number, because 25448257 - 2¹¹ = 25446209 is a prime.

It is a super-2 number, since 2×25448257² = 1295227568676098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25448237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12724128 + 12724129.

It is an arithmetic number, because the mean of its divisors is an integer number (12724129).

Almost surely, 2^25448257 is an apocalyptic number.

It is an amenable number.

25448257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25448257 is an equidigital number, since it uses as much as digits as its factorization.

25448257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89600, while the sum is 37.

The square root of 25448257 is about 5044.6265471291. The cubic root of 25448257 is about 294.1390467888.

It can be divided in two parts, 2544 and 8257, that added together give a palindrome (10801).

The spelling of 25448257 in words is "twenty-five million, four hundred forty-eight thousand, two hundred fifty-seven".