25405201 has 4 divisors (see below), whose sum is σ = 25470900. Its totient is φ = 25339504.

The previous prime is 25405183. The next prime is 25405229. The reversal of 25405201 is 10250452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13838400 + 11566801 = 3720^2 + 3401^2 .

It is a cyclic number.

It is not a de Polignac number, because 25405201 - 2¹⁹ = 24880913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25405231) 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, 32266 + ... + 33043.

It is an arithmetic number, because the mean of its divisors is an integer number (6367725).

Almost surely, 2^25405201 is an apocalyptic number.

It is an amenable number.

25405201 is a deficient number, since it is larger than the sum of its proper divisors (65699).

25405201 is an equidigital number, since it uses as much as digits as its factorization.

25405201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65698.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 25405201 is about 5040.3572294035. The cubic root of 25405201 is about 293.9730681671.

Adding to 25405201 its reverse (10250452), we get a palindrome (35655653).

The spelling of 25405201 in words is "twenty-five million, four hundred five thousand, two hundred one".