13420025 has 6 divisors (see below), whose sum is σ = 16640862. Its totient is φ = 10736000.

The previous prime is 13420019. The next prime is 13420031. The reversal of 13420025 is 52002431.

It is an interprime number because it is at equal distance from previous prime (13420019) and next prime (13420031).

It can be written as a sum of positive squares in 3 ways, for example, as 344569 + 13075456 = 587^2 + 3616^2 .

It is not a de Polignac number, because 13420025 - 2¹² = 13415929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13419985 and 13420012.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 268376 + ... + 268425.

It is an arithmetic number, because the mean of its divisors is an integer number (2773477).

Almost surely, 2^13420025 is an apocalyptic number.

It is an amenable number.

13420025 is a deficient number, since it is larger than the sum of its proper divisors (3220837).

13420025 is an equidigital number, since it uses as much as digits as its factorization.

13420025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536811 (or 536806 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 13420025 is about 3663.3352289956. The cubic root of 13420025 is about 237.6390321683.

Adding to 13420025 its reverse (52002431), we get a palindrome (65422456).

The spelling of 13420025 in words is "thirteen million, four hundred twenty thousand, twenty-five".