13724425 has 36 divisors (see below), whose sum is σ = 20202700. Its totient is φ = 9187200.

The previous prime is 13724387. The next prime is 13724449. The reversal of 13724425 is 52442731.

It can be written as a sum of positive squares in 6 ways, for example, as 627264 + 13097161 = 792^2 + 3619^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13724425 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13724393 and 13724402.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 39151 + ... + 39499.

Almost surely, 2^13724425 is an apocalyptic number.

13724425 is the 3025-th pentagonal number.

It is an amenable number.

13724425 is a deficient number, since it is larger than the sum of its proper divisors (6478275).

13724425 is a wasteful number, since it uses less digits than its factorization.

13724425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 378 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 13724425 is about 3704.6491061908. The cubic root of 13724425 is about 239.4223666512.

The spelling of 13724425 in words is "thirteen million, seven hundred twenty-four thousand, four hundred twenty-five".