25404023 has 4 divisors (see below), whose sum is σ = 25650768. Its totient is φ = 25157280.

The previous prime is 25403993. The next prime is 25404031. The reversal of 25404023 is 32040452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25404023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25403986 and 25404004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25404523) 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, 123218 + ... + 123423.

It is an arithmetic number, because the mean of its divisors is an integer number (6412692).

Almost surely, 2^25404023 is an apocalyptic number.

25404023 is a deficient number, since it is larger than the sum of its proper divisors (246745).

25404023 is a wasteful number, since it uses less digits than its factorization.

25404023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246744.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 25404023 is about 5040.2403712521. The cubic root of 25404023 is about 293.9685244043.

Adding to 25404023 its reverse (32040452), we get a palindrome (57444475).

The spelling of 25404023 in words is "twenty-five million, four hundred four thousand, twenty-three".