25443725 has 6 divisors (see below), whose sum is σ = 31550250. Its totient is φ = 20354960.

The previous prime is 25443721. The next prime is 25443731. The reversal of 25443725 is 52734452.

It can be written as a sum of positive squares in 3 ways, for example, as 4338889 + 21104836 = 2083^2 + 4594^2 .

It is not a de Polignac number, because 25443725 - 2² = 25443721 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25443691 and 25443700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25443721) 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, 508850 + ... + 508899.

It is an arithmetic number, because the mean of its divisors is an integer number (5258375).

Almost surely, 2^25443725 is an apocalyptic number.

25443725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25443725 is a deficient number, since it is larger than the sum of its proper divisors (6106525).

25443725 is a wasteful number, since it uses less digits than its factorization.

25443725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017759 (or 1017754 counting only the distinct ones).

The product of its digits is 33600, while the sum is 32.

The square root of 25443725 is about 5044.1773362958. The cubic root of 25443725 is about 294.1215849865.

The spelling of 25443725 in words is "twenty-five million, four hundred forty-three thousand, seven hundred twenty-five".