13601559 has 4 divisors (see below), whose sum is σ = 18135416. Its totient is φ = 9067704.

The previous prime is 13601543. The next prime is 13601561. The reversal of 13601559 is 95510631.

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

It is not a de Polignac number, because 13601559 - 2⁴ = 13601543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13601059) 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, 2266924 + ... + 2266929.

It is an arithmetic number, because the mean of its divisors is an integer number (4533854).

Almost surely, 2^13601559 is an apocalyptic number.

13601559 is a deficient number, since it is larger than the sum of its proper divisors (4533857).

13601559 is an equidigital number, since it uses as much as digits as its factorization.

13601559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533856.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 13601559 is about 3688.0291484748. The cubic root of 13601559 is about 238.7057588227.

The spelling of 13601559 in words is "thirteen million, six hundred one thousand, five hundred fifty-nine".