25305243 has 4 divisors (see below), whose sum is σ = 33740328. Its totient is φ = 16870160.

The previous prime is 25305233. The next prime is 25305251. The reversal of 25305243 is 34250352.

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

It is a cyclic number.

It is not a de Polignac number, because 25305243 - 2⁴ = 25305227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25305233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4217538 + ... + 4217543.

It is an arithmetic number, because the mean of its divisors is an integer number (8435082).

Almost surely, 2^25305243 is an apocalyptic number.

25305243 is a deficient number, since it is larger than the sum of its proper divisors (8435085).

25305243 is an equidigital number, since it uses as much as digits as its factorization.

25305243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8435084.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 25305243 is about 5030.4316912170. The cubic root of 25305243 is about 293.5870109544.

Adding to 25305243 its reverse (34250352), we get a palindrome (59555595).

The spelling of 25305243 in words is "twenty-five million, three hundred five thousand, two hundred forty-three".