25210005 has 16 divisors (see below), whose sum is σ = 40824000. Its totient is φ = 13282688.

The previous prime is 25209991. The next prime is 25210007. The reversal of 25210005 is 50001252.

It is a cyclic number.

It is not a de Polignac number, because 25210005 - 2⁸ = 25209749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25210007) 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, 8880 + ... + 11369.

It is an arithmetic number, because the mean of its divisors is an integer number (2551500).

Almost surely, 2^25210005 is an apocalyptic number.

It is an amenable number.

25210005 is a deficient number, since it is larger than the sum of its proper divisors (15613995).

25210005 is a wasteful number, since it uses less digits than its factorization.

25210005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20340.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 25210005 is about 5020.9565821664. The cubic root of 25210005 is about 293.2182363816.

Adding to 25210005 its reverse (50001252), we get a palindrome (75211257).

The spelling of 25210005 in words is "twenty-five million, two hundred ten thousand, five".