25312506 has 8 divisors (see below), whose sum is σ = 50625024. Its totient is φ = 8437500.

The previous prime is 25312501. The next prime is 25312513. The reversal of 25312506 is 60521352.

It is a sphenic number, since it is the product of 3 distinct primes.

25312506 is an admirable number.

It is a Curzon number.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (25312501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2109370 + ... + 2109381.

It is an arithmetic number, because the mean of its divisors is an integer number (6328128).

Almost surely, 2^25312506 is an apocalyptic number.

25312506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25312506 is a wasteful number, since it uses less digits than its factorization.

25312506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4218756.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 25312506 is about 5031.1535456593. The cubic root of 25312506 is about 293.6150962869.

Adding to 25312506 its reverse (60521352), we get a palindrome (85833858).

The spelling of 25312506 in words is "twenty-five million, three hundred twelve thousand, five hundred six".