25082621 has 4 divisors (see below), whose sum is σ = 25555932. Its totient is φ = 24609312.

The previous prime is 25082591. The next prime is 25082647. The reversal of 25082621 is 12628052.

25082621 is nontrivially palindromic in base 2.

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 14100025 + 10982596 = 3755^2 + 3314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25082621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25082221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236576 + ... + 236681.

It is an arithmetic number, because the mean of its divisors is an integer number (6388983).

Almost surely, 2^25082621 is an apocalyptic number.

It is an amenable number.

25082621 is a deficient number, since it is larger than the sum of its proper divisors (473311).

25082621 is an equidigital number, since it uses as much as digits as its factorization.

25082621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473310.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 25082621 is about 5008.2552850269. The cubic root of 25082621 is about 292.7235333194.

The spelling of 25082621 in words is "twenty-five million, eighty-two thousand, six hundred twenty-one".