25155397 has 2 divisors, whose sum is σ = 25155398. Its totient is φ = 25155396.

The previous prime is 25155349. The next prime is 25155413. The reversal of 25155397 is 79355152.

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., 13771521 + 11383876 = 3711^2 + 3374^2 .

It is a cyclic number.

It is not a de Polignac number, because 25155397 - 2¹⁹ = 24631109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25155197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12577698 + 12577699.

It is an arithmetic number, because the mean of its divisors is an integer number (12577699).

Almost surely, 2^25155397 is an apocalyptic number.

It is an amenable number.

25155397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25155397 is an equidigital number, since it uses as much as digits as its factorization.

25155397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 37.

The square root of 25155397 is about 5015.5156265333. The cubic root of 25155397 is about 293.0063676314.

It can be divided in two parts, 25155 and 397, that added together give a palindrome (25552).

The spelling of 25155397 in words is "twenty-five million, one hundred fifty-five thousand, three hundred ninety-seven".