13725643 has 4 divisors (see below), whose sum is σ = 14044888. Its totient is φ = 13406400.

The previous prime is 13725637. The next prime is 13725659. The reversal of 13725643 is 34652731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13725643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13725143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159558 + ... + 159643.

It is an arithmetic number, because the mean of its divisors is an integer number (3511222).

Almost surely, 2^13725643 is an apocalyptic number.

13725643 is a deficient number, since it is larger than the sum of its proper divisors (319245).

13725643 is an equidigital number, since it uses as much as digits as its factorization.

13725643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319244.

The product of its digits is 15120, while the sum is 31.

The square root of 13725643 is about 3704.8134905822. The cubic root of 13725643 is about 239.4294491050.

The spelling of 13725643 in words is "thirteen million, seven hundred twenty-five thousand, six hundred forty-three".