25553242 has 32 divisors (see below), whose sum is σ = 46013184. Its totient is φ = 10488000.

The previous prime is 25553237. The next prime is 25553243. The reversal of 25553242 is 24235552.

It is a self number, because there is not a number n which added to its sum of digits gives 25553242.

It is not an unprimeable number, because it can be changed into a prime (25553243) 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 15 ways as a sum of consecutive naturals, for example, 12492 + ... + 14392.

It is an arithmetic number, because the mean of its divisors is an integer number (1437912).

Almost surely, 2^25553242 is an apocalyptic number.

25553242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25553242 is a deficient number, since it is larger than the sum of its proper divisors (20459942).

25553242 is a wasteful number, since it uses less digits than its factorization.

25553242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974.

The product of its digits is 12000, while the sum is 28.

The square root of 25553242 is about 5055.0214638516. The cubic root of 25553242 is about 294.5429751758.

Adding to 25553242 its reverse (24235552), we get a palindrome (49788794).

The spelling of 25553242 in words is "twenty-five million, five hundred fifty-three thousand, two hundred forty-two".