25621201 has 4 divisors (see below), whose sum is σ = 25945600. Its totient is φ = 25296804.

The previous prime is 25621199. The next prime is 25621237. The reversal of 25621201 is 10212652.

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 25621201 - 2¹ = 25621199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25621801) 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, 162081 + ... + 162238.

It is an arithmetic number, because the mean of its divisors is an integer number (6486400).

Almost surely, 2^25621201 is an apocalyptic number.

It is an amenable number.

25621201 is a deficient number, since it is larger than the sum of its proper divisors (324399).

25621201 is an equidigital number, since it uses as much as digits as its factorization.

25621201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324398.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 25621201 is about 5061.7389304467. The cubic root of 25621201 is about 294.8038569750.

Adding to 25621201 its reverse (10212652), we get a palindrome (35833853).

The spelling of 25621201 in words is "twenty-five million, six hundred twenty-one thousand, two hundred one".