25880001 has 16 divisors (see below), whose sum is σ = 41756544. Its totient is φ = 13918464.

The previous prime is 25879963. The next prime is 25880003. The reversal of 25880001 is 10008852.

It is not a de Polignac number, because 25880001 - 2⁷ = 25879873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25880003) 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, 35890 + ... + 36603.

It is an arithmetic number, because the mean of its divisors is an integer number (2609784).

Almost surely, 2^25880001 is an apocalyptic number.

25880001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25880001 is a deficient number, since it is larger than the sum of its proper divisors (15876543).

25880001 is a wasteful number, since it uses less digits than its factorization.

25880001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72520.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 25880001 is about 5087.2390350759. The cubic root of 25880001 is about 295.7931390387.

Adding to 25880001 its reverse (10008852), we get a palindrome (35888853).

The spelling of 25880001 in words is "twenty-five million, eight hundred eighty thousand, one".