25424244 has 18 divisors (see below), whose sum is σ = 64266930. Its totient is φ = 8474736.

The previous prime is 25424237. The next prime is 25424263. The reversal of 25424244 is 44242452.

It can be written as a sum of positive squares in only one way, i.e., 24383844 + 1040400 = 4938^2 + 1020^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 353079 + ... + 353150.

It is an arithmetic number, because the mean of its divisors is an integer number (3570385).

Almost surely, 2^25424244 is an apocalyptic number.

It is an amenable number.

25424244 is an abundant number, since it is smaller than the sum of its proper divisors (38842686).

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

25424244 is a wasteful number, since it uses less digits than its factorization.

25424244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706239 (or 706234 counting only the distinct ones).

The product of its digits is 10240, while the sum is 27.

The square root of 25424244 is about 5042.2459281554. The cubic root of 25424244 is about 294.0465010440.

Adding to 25424244 its reverse (44242452), we get a palindrome (69666696).

It can be divided in two parts, 2542 and 4244, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 25424244 in words is "twenty-five million, four hundred twenty-four thousand, two hundred forty-four".