25405017 has 16 divisors (see below), whose sum is σ = 37187328. Its totient is φ = 15299280.

The previous prime is 25405013. The next prime is 25405019. The reversal of 25405017 is 71050452.

It is not a de Polignac number, because 25405017 - 2² = 25405013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25405013) 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, 3018 + ... + 7740.

It is an arithmetic number, because the mean of its divisors is an integer number (2324208).

Almost surely, 2^25405017 is an apocalyptic number.

It is an amenable number.

25405017 is a deficient number, since it is larger than the sum of its proper divisors (11782311).

25405017 is a wasteful number, since it uses less digits than its factorization.

25405017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4900.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 25405017 is about 5040.3389766959. The cubic root of 25405017 is about 293.9723584545.

Adding to 25405017 its reverse (71050452), we get a palindrome (96455469).

It can be divided in two parts, 2540 and 5017, that added together give a palindrome (7557).

The spelling of 25405017 in words is "twenty-five million, four hundred five thousand, seventeen".