25621133 has 4 divisors (see below), whose sum is σ = 25657980. Its totient is φ = 25584288.

The previous prime is 25621129. The next prime is 25621151. The reversal of 25621133 is 33112652.

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 8868484 + 16752649 = 2978^2 + 4093^2 .

It is a cyclic number.

It is not a de Polignac number, because 25621133 - 2² = 25621129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25621099 and 25621108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25621033) 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, 17360 + ... + 18777.

It is an arithmetic number, because the mean of its divisors is an integer number (6414495).

Almost surely, 2^25621133 is an apocalyptic number.

It is an amenable number.

25621133 is a deficient number, since it is larger than the sum of its proper divisors (36847).

25621133 is an equidigital number, since it uses as much as digits as its factorization.

25621133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36846.

The product of its digits is 1080, while the sum is 23.

The square root of 25621133 is about 5061.7322133831. The cubic root of 25621133 is about 294.8035961665.

Adding to 25621133 its reverse (33112652), we get a palindrome (58733785).

The spelling of 25621133 in words is "twenty-five million, six hundred twenty-one thousand, one hundred thirty-three".