25000005 has 16 divisors (see below), whose sum is σ = 40852224. Its totient is φ = 13049280.

The previous prime is 24999983. The next prime is 25000009. The reversal of 25000005 is 50000052.

25000005 = 1170² + 1171² + ... + 1187².

It is not a de Polignac number, because 25000005 - 2⁵ = 24999973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25000009) 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, 17026 + ... + 18435.

It is an arithmetic number, because the mean of its divisors is an integer number (2553264).

Almost surely, 2^25000005 is an apocalyptic number.

It is an amenable number.

25000005 is a deficient number, since it is larger than the sum of its proper divisors (15852219).

25000005 is a wasteful number, since it uses less digits than its factorization.

25000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35516.

The product of its (nonzero) digits is 50, while the sum is 12.

The square root of 25000005 is about 5000.0005000000. Note that the first 3 decimals coincide. The cubic root of 25000005 is about 292.4017933147.

Adding to 25000005 its reverse (50000052), we get a palindrome (75000057).

The spelling of 25000005 in words is "twenty-five million, five", and thus it is an aban number and an uban number.