25755409 has 4 divisors (see below), whose sum is σ = 26354416. Its totient is φ = 25156404.

The previous prime is 25755407. The next prime is 25755413. The reversal of 25755409 is 90455752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25755409 - 2¹ = 25755407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25755407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299439 + ... + 299524.

It is an arithmetic number, because the mean of its divisors is an integer number (6588604).

Almost surely, 2^25755409 is an apocalyptic number.

It is an amenable number.

25755409 is a deficient number, since it is larger than the sum of its proper divisors (599007).

25755409 is an equidigital number, since it uses as much as digits as its factorization.

25755409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599006.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 25755409 is about 5074.9787191672. The cubic root of 25755409 is about 295.3177042596.

The spelling of 25755409 in words is "twenty-five million, seven hundred fifty-five thousand, four hundred nine".