25665469 has 2 divisors, whose sum is σ = 25665470. Its totient is φ = 25665468.

The previous prime is 25665463. The next prime is 25665473. The reversal of 25665469 is 96456652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25452025 + 213444 = 5045^2 + 462^2 .

It is a cyclic number.

It is not a de Polignac number, because 25665469 - 2¹⁵ = 25632701 is a prime.

It is a super-2 number, since 2×25665469² = 1317432597979922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25665463) 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, 12832734 + 12832735.

It is an arithmetic number, because the mean of its divisors is an integer number (12832735).

Almost surely, 2^25665469 is an apocalyptic number.

It is an amenable number.

25665469 is a deficient number, since it is larger than the sum of its proper divisors (1).

25665469 is an equidigital number, since it uses as much as digits as its factorization.

25665469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The square root of 25665469 is about 5066.1098487893. The cubic root of 25665469 is about 294.9735454588.

The spelling of 25665469 in words is "twenty-five million, six hundred sixty-five thousand, four hundred sixty-nine".