25505012 has 12 divisors (see below), whose sum is σ = 48067236. Its totient is φ = 11771520.

The previous prime is 25505003. The next prime is 25505017. The reversal of 25505012 is 21050552.

It can be written as a sum of positive squares in 2 ways, for example, as 6180196 + 19324816 = 2486^2 + 4396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245189 + ... + 245292.

It is an arithmetic number, because the mean of its divisors is an integer number (4005603).

Almost surely, 2^25505012 is an apocalyptic number.

It is an amenable number.

25505012 is a deficient number, since it is larger than the sum of its proper divisors (22562224).

25505012 is a wasteful number, since it uses less digits than its factorization.

25505012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490498 (or 490496 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 25505012 is about 5050.2487067470. The cubic root of 25505012 is about 294.3575485468.

Adding to 25505012 its reverse (21050552), we get a palindrome (46555564).

The spelling of 25505012 in words is "twenty-five million, five hundred five thousand, twelve".