25991441 has 16 divisors (see below), whose sum is σ = 30387840. Its totient is φ = 21772800.

The previous prime is 25991437. The next prime is 25991461. The reversal of 25991441 is 14419952.

It is not a de Polignac number, because 25991441 - 2² = 25991437 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25991401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68390 + ... + 68768.

It is an arithmetic number, because the mean of its divisors is an integer number (1899240).

Almost surely, 2^25991441 is an apocalyptic number.

It is an amenable number.

25991441 is a deficient number, since it is larger than the sum of its proper divisors (4396399).

25991441 is a wasteful number, since it uses less digits than its factorization.

25991441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584.

The product of its digits is 12960, while the sum is 35.

The square root of 25991441 is about 5098.1801655100. The cubic root of 25991441 is about 296.2170955757.

The spelling of 25991441 in words is "twenty-five million, nine hundred ninety-one thousand, four hundred forty-one".