25813801 has 4 divisors (see below), whose sum is σ = 27799492. Its totient is φ = 23828112.

The previous prime is 25813771. The next prime is 25813813. The reversal of 25813801 is 10831852.

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 8549776 + 17264025 = 2924^2 + 4155^2 .

It is a cyclic number.

It is not a de Polignac number, because 25813801 - 2⁹ = 25813289 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 25813801.

It is not an unprimeable number, because it can be changed into a prime (25813891) 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, 992826 + ... + 992851.

It is an arithmetic number, because the mean of its divisors is an integer number (6949873).

Almost surely, 2^25813801 is an apocalyptic number.

It is an amenable number.

25813801 is a deficient number, since it is larger than the sum of its proper divisors (1985691).

25813801 is a wasteful number, since it uses less digits than its factorization.

25813801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985690.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 25813801 is about 5080.7283926618. The cubic root of 25813801 is about 295.5407147078.

The spelling of 25813801 in words is "twenty-five million, eight hundred thirteen thousand, eight hundred one".