25243506 has 12 divisors (see below), whose sum is σ = 54694302. Its totient is φ = 8414496.

The previous prime is 25243481. The next prime is 25243507. The reversal of 25243506 is 60534252.

It can be written as a sum of positive squares in only one way, i.e., 23126481 + 2117025 = 4809^2 + 1455^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25243506.

It is not an unprimeable number, because it can be changed into a prime (25243507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 701191 + ... + 701226.

Almost surely, 2^25243506 is an apocalyptic number.

25243506 is an abundant number, since it is smaller than the sum of its proper divisors (29450796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25243506 is a wasteful number, since it uses less digits than its factorization.

25243506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402425 (or 1402422 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 25243506 is about 5024.2915918565. The cubic root of 25243506 is about 293.3480625639.

Adding to 25243506 its reverse (60534252), we get a palindrome (85777758).

The spelling of 25243506 in words is "twenty-five million, two hundred forty-three thousand, five hundred six".