25421203 has 4 divisors (see below), whose sum is σ = 25433640. Its totient is φ = 25408768.

The previous prime is 25421161. The next prime is 25421237. The reversal of 25421203 is 30212452.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25421203 - 2⁹ = 25420691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25425203) 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, 2350 + ... + 7507.

It is an arithmetic number, because the mean of its divisors is an integer number (6358410).

Almost surely, 2^25421203 is an apocalyptic number.

25421203 is a deficient number, since it is larger than the sum of its proper divisors (12437).

25421203 is an equidigital number, since it uses as much as digits as its factorization.

25421203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12436.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 25421203 is about 5041.9443670076. The cubic root of 25421203 is about 294.0347769187.

Adding to 25421203 its reverse (30212452), we get a palindrome (55633655).

The spelling of 25421203 in words is "twenty-five million, four hundred twenty-one thousand, two hundred three".