25620506 has 8 divisors (see below), whose sum is σ = 38562804. Its totient is φ = 12766240.

The previous prime is 25620487. The next prime is 25620509. The reversal of 25620506 is 60502652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 22231225 + 3389281 = 4715^2 + 1841^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25620509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21275 + ... + 22446.

Almost surely, 2^25620506 is an apocalyptic number.

25620506 is a deficient number, since it is larger than the sum of its proper divisors (12942298).

25620506 is a wasteful number, since it uses less digits than its factorization.

25620506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44016.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 25620506 is about 5061.6702776850. The cubic root of 25620506 is about 294.8011913371.

The spelling of 25620506 in words is "twenty-five million, six hundred twenty thousand, five hundred six".