25464409 has 2 divisors, whose sum is σ = 25464410. Its totient is φ = 25464408.

The previous prime is 25464379. The next prime is 25464421. The reversal of 25464409 is 90446452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14040009 + 11424400 = 3747^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 25464409 - 2¹¹ = 25462361 is a prime.

It is a super-2 number, since 2×25464409² = 1296872251438562, which contains 22 as substring.

It is equal to p_1593088 and since 25464409 and 1593088 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25464479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12732204 + 12732205.

It is an arithmetic number, because the mean of its divisors is an integer number (12732205).

Almost surely, 2^25464409 is an apocalyptic number.

It is an amenable number.

25464409 is a deficient number, since it is larger than the sum of its proper divisors (1).

25464409 is an equidigital number, since it uses as much as digits as its factorization.

25464409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 25464409 is about 5046.2272045559. The cubic root of 25464409 is about 294.2012636118.

The spelling of 25464409 in words is "twenty-five million, four hundred sixty-four thousand, four hundred nine".