13523842 has 4 divisors (see below), whose sum is σ = 20285766. Its totient is φ = 6761920.

The previous prime is 13523821. The next prime is 13523863. The reversal of 13523842 is 24832531.

13523842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24832531 = 229 ⋅108439.

It is an interprime number because it is at equal distance from previous prime (13523821) and next prime (13523863).

It can be written as a sum of positive squares in only one way, i.e., 9678321 + 3845521 = 3111^2 + 1961^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13523842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3380959 + ... + 3380962.

Almost surely, 2^13523842 is an apocalyptic number.

13523842 is a deficient number, since it is larger than the sum of its proper divisors (6761924).

13523842 is an equidigital number, since it uses as much as digits as its factorization.

13523842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6761923.

The product of its digits is 5760, while the sum is 28.

The square root of 13523842 is about 3677.4776681851. The cubic root of 13523842 is about 238.2502487494.

It can be divided in two parts, 13523 and 842, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 13523842 in words is "thirteen million, five hundred twenty-three thousand, eight hundred forty-two".