25980605 has 16 divisors (see below), whose sum is σ = 35716224. Its totient is φ = 17772480.

The previous prime is 25980601. The next prime is 25980631. The reversal of 25980605 is 50608952.

It is not a de Polignac number, because 25980605 - 2² = 25980601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25980601) 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, 22574 + ... + 23696.

It is an arithmetic number, because the mean of its divisors is an integer number (2232264).

Almost surely, 2^25980605 is an apocalyptic number.

It is an amenable number.

25980605 is a deficient number, since it is larger than the sum of its proper divisors (9735619).

25980605 is a wasteful number, since it uses less digits than its factorization.

25980605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 25980605 is about 5097.1173225658. The cubic root of 25980605 is about 296.1759249122.

The spelling of 25980605 in words is "twenty-five million, nine hundred eighty thousand, six hundred five".