25801005 has 16 divisors (see below), whose sum is σ = 41806080. Its totient is φ = 13585728.

The previous prime is 25800997. The next prime is 25801049. The reversal of 25801005 is 50010852.

It is not a de Polignac number, because 25801005 - 2³ = 25800997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9702 + ... + 12071.

It is an arithmetic number, because the mean of its divisors is an integer number (2612880).

Almost surely, 2^25801005 is an apocalyptic number.

It is an amenable number.

25801005 is a deficient number, since it is larger than the sum of its proper divisors (16005075).

25801005 is a wasteful number, since it uses less digits than its factorization.

25801005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21860.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 25801005 is about 5079.4689683076. The cubic root of 25801005 is about 295.4918730819.

Adding to 25801005 its reverse (50010852), we get a palindrome (75811857).

The spelling of 25801005 in words is "twenty-five million, eight hundred one thousand, five".