13720143 has 8 divisors (see below), whose sum is σ = 18475056. Its totient is φ = 9056000.

The previous prime is 13720129. The next prime is 13720159. The reversal of 13720143 is 34102731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13720143 - 2⁴ = 13720127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13720543) 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 7 ways as a sum of consecutive naturals, for example, 22338 + ... + 22943.

It is an arithmetic number, because the mean of its divisors is an integer number (2309382).

Almost surely, 2^13720143 is an apocalyptic number.

13720143 is a deficient number, since it is larger than the sum of its proper divisors (4754913).

13720143 is a wasteful number, since it uses less digits than its factorization.

13720143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45385.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 13720143 is about 3704.0711386257. The cubic root of 13720143 is about 239.3974642548.

Adding to 13720143 its reverse (34102731), we get a palindrome (47822874).

The spelling of 13720143 in words is "thirteen million, seven hundred twenty thousand, one hundred forty-three".