13620543 has 4 divisors (see below), whose sum is σ = 18160728. Its totient is φ = 9080360.

The previous prime is 13620533. The next prime is 13620571. The reversal of 13620543 is 34502631.

It is a happy number.

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 13620543 - 2⁴ = 13620527 is a prime.

It is a super-2 number, since 2×13620543² = 371038383229698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2270088 + ... + 2270093.

It is an arithmetic number, because the mean of its divisors is an integer number (4540182).

Almost surely, 2^13620543 is an apocalyptic number.

13620543 is a deficient number, since it is larger than the sum of its proper divisors (4540185).

13620543 is an equidigital number, since it uses as much as digits as its factorization.

13620543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4540184.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 13620543 is about 3690.6019834168. The cubic root of 13620543 is about 238.8167628500.

The spelling of 13620543 in words is "thirteen million, six hundred twenty thousand, five hundred forty-three".