25840403 has 4 divisors (see below), whose sum is σ = 25891680. Its totient is φ = 25789128.

The previous prime is 25840387. The next prime is 25840417. The reversal of 25840403 is 30404852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25840403 - 2⁴ = 25840387 is a prime.

It is a super-3 number, since 3×25840403³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25840483) 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 in 3 ways as a sum of consecutive naturals, for example, 24875 + ... + 25892.

It is an arithmetic number, because the mean of its divisors is an integer number (6472920).

Almost surely, 2^25840403 is an apocalyptic number.

25840403 is a deficient number, since it is larger than the sum of its proper divisors (51277).

25840403 is an equidigital number, since it uses as much as digits as its factorization.

25840403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51276.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 25840403 is about 5083.3456502583. The cubic root of 25840403 is about 295.6422014404.

The spelling of 25840403 in words is "twenty-five million, eight hundred forty thousand, four hundred three".