25687441 has 4 divisors (see below), whose sum is σ = 27663412. Its totient is φ = 23711472.

The previous prime is 25687433. The next prime is 25687477. The reversal of 25687441 is 14478652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8910225 + 16777216 = 2985^2 + 4096^2 .

It is a cyclic number.

It is not a de Polignac number, because 25687441 - 2³ = 25687433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25687441.

It is not an unprimeable number, because it can be changed into a prime (25684441) 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, 987966 + ... + 987991.

It is an arithmetic number, because the mean of its divisors is an integer number (6915853).

Almost surely, 2^25687441 is an apocalyptic number.

It is an amenable number.

25687441 is a deficient number, since it is larger than the sum of its proper divisors (1975971).

25687441 is a wasteful number, since it uses less digits than its factorization.

25687441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975970.

The product of its digits is 53760, while the sum is 37.

The square root of 25687441 is about 5068.2779126642. The cubic root of 25687441 is about 295.0576962703.

The spelling of 25687441 in words is "twenty-five million, six hundred eighty-seven thousand, four hundred forty-one".