13020143 has 4 divisors (see below), whose sum is σ = 13057800. Its totient is φ = 12982488.

The previous prime is 13020131. The next prime is 13020151. The reversal of 13020143 is 34102031.

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 13020143 - 2⁸ = 13019887 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 (13020103) 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, 18305 + ... + 19002.

It is an arithmetic number, because the mean of its divisors is an integer number (3264450).

Almost surely, 2^13020143 is an apocalyptic number.

13020143 is a deficient number, since it is larger than the sum of its proper divisors (37657).

13020143 is an equidigital number, since it uses as much as digits as its factorization.

13020143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37656.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13020143 is about 3608.3435257747. The cubic root of 13020143 is about 235.2548495241.

Adding to 13020143 its reverse (34102031), we get a palindrome (47122174).

The spelling of 13020143 in words is "thirteen million, twenty thousand, one hundred forty-three".