13825971 has 12 divisors (see below), whose sum is σ = 20710872. Its totient is φ = 9217152.

The previous prime is 13825963. The next prime is 13825993. The reversal of 13825971 is 17952831.

It is not a de Polignac number, because 13825971 - 2³ = 13825963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13825271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28206 + ... + 28691.

It is an arithmetic number, because the mean of its divisors is an integer number (1725906).

Almost surely, 2^13825971 is an apocalyptic number.

13825971 is a deficient number, since it is larger than the sum of its proper divisors (6884901).

13825971 is an frugal number, since it uses more digits than its factorization.

13825971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56912 (or 56900 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13825971 is about 3718.3290602097. The cubic root of 13825971 is about 240.0114057079.

The spelling of 13825971 in words is "thirteen million, eight hundred twenty-five thousand, nine hundred seventy-one".