25443245 has 4 divisors (see below), whose sum is σ = 30531900. Its totient is φ = 20354592.

The previous prime is 25443227. The next prime is 25443259. The reversal of 25443245 is 54234452.

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 18028516 + 7414729 = 4246^2 + 2723^2 .

It is a cyclic number.

It is not a de Polignac number, because 25443245 - 2¹² = 25439149 is a prime.

It is a super-2 number, since 2×25443245² = 1294717432260050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 2544320 + ... + 2544329.

It is an arithmetic number, because the mean of its divisors is an integer number (7632975).

Almost surely, 2^25443245 is an apocalyptic number.

It is an amenable number.

25443245 is a deficient number, since it is larger than the sum of its proper divisors (5088655).

25443245 is an equidigital number, since it uses as much as digits as its factorization.

25443245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5088654.

The product of its digits is 19200, while the sum is 29.

The square root of 25443245 is about 5044.1297564595. The cubic root of 25443245 is about 294.1197354244.

Adding to 25443245 its reverse (54234452), we get a palindrome (79677697).

The spelling of 25443245 in words is "twenty-five million, four hundred forty-three thousand, two hundred forty-five".