13525643 has 4 divisors (see below), whose sum is σ = 13582008. Its totient is φ = 13469280.

The previous prime is 13525639. The next prime is 13525649. The reversal of 13525643 is 34652531.

13525643 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13525643 - 2² = 13525639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13525649) 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, 27821 + ... + 28302.

It is an arithmetic number, because the mean of its divisors is an integer number (3395502).

Almost surely, 2^13525643 is an apocalyptic number.

13525643 is a deficient number, since it is larger than the sum of its proper divisors (56365).

13525643 is an equidigital number, since it uses as much as digits as its factorization.

13525643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56364.

The product of its digits is 10800, while the sum is 29.

The square root of 13525643 is about 3677.7225289573. The cubic root of 13525643 is about 238.2608243844.

The spelling of 13525643 in words is "thirteen million, five hundred twenty-five thousand, six hundred forty-three".