13540423 has 4 divisors (see below), whose sum is σ = 14582008. Its totient is φ = 12498840.

The previous prime is 13540421. The next prime is 13540433. The reversal of 13540423 is 32404531.

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 13540423 - 2¹ = 13540421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13540394 and 13540403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13540421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520773 + ... + 520798.

It is an arithmetic number, because the mean of its divisors is an integer number (3645502).

Almost surely, 2^13540423 is an apocalyptic number.

13540423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

13540423 is a deficient number, since it is larger than the sum of its proper divisors (1041585).

13540423 is a wasteful number, since it uses less digits than its factorization.

13540423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041584.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 13540423 is about 3679.7313760654. The cubic root of 13540423 is about 238.3475784380.

Adding to 13540423 its reverse (32404531), we get a palindrome (45944954).

It can be divided in two parts, 13540 and 423, that multiplied together give a triangular number (5727420 = T₃₃₈₄).

The spelling of 13540423 in words is "thirteen million, five hundred forty thousand, four hundred twenty-three".