25000505 has 4 divisors (see below), whose sum is σ = 30000612. Its totient is φ = 20000400.

The previous prime is 25000487. The next prime is 25000511. The reversal of 25000505 is 50500052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2948089 + 22052416 = 1717^2 + 4696^2 .

It is not a de Polignac number, because 25000505 - 2²⁴ = 8223289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500046 + ... + 2500055.

It is an arithmetic number, because the mean of its divisors is an integer number (7500153).

Almost surely, 2^25000505 is an apocalyptic number.

It is an amenable number.

25000505 is a deficient number, since it is larger than the sum of its proper divisors (5000107).

25000505 is an equidigital number, since it uses as much as digits as its factorization.

25000505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000106.

The product of its (nonzero) digits is 250, while the sum is 17.

The square root of 25000505 is about 5000.0504997450. The cubic root of 25000505 is about 292.4037426466.

Adding to 25000505 its reverse (50500052), we get a palindrome (75500557).

The spelling of 25000505 in words is "twenty-five million, five hundred five", and thus it is an aban number.