25600421 has 8 divisors (see below), whose sum is σ = 31917504. Its totient is φ = 19948320.

The previous prime is 25600397. The next prime is 25600427. The reversal of 25600421 is 12400652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25600421 - 2¹⁸ = 25338277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25600393 and 25600402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25600427) 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 7 ways as a sum of consecutive naturals, for example, 166160 + ... + 166313.

It is an arithmetic number, because the mean of its divisors is an integer number (3989688).

Almost surely, 2^25600421 is an apocalyptic number.

It is an amenable number.

25600421 is a deficient number, since it is larger than the sum of its proper divisors (6317083).

25600421 is a wasteful number, since it uses less digits than its factorization.

25600421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332491.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 25600421 is about 5059.6858598138. The cubic root of 25600421 is about 294.7241354837.

The spelling of 25600421 in words is "twenty-five million, six hundred thousand, four hundred twenty-one".