13402143 has 12 divisors (see below), whose sum is σ = 19624800. Its totient is φ = 8811936.

The previous prime is 13402141. The next prime is 13402157. The reversal of 13402143 is 34120431.

It is not a de Polignac number, because 13402143 - 2¹ = 13402141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9543 + ... + 10856.

It is an arithmetic number, because the mean of its divisors is an integer number (1635400).

Almost surely, 2^13402143 is an apocalyptic number.

13402143 is a deficient number, since it is larger than the sum of its proper divisors (6222657).

13402143 is a wasteful number, since it uses less digits than its factorization.

13402143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20478 (or 20475 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13402143 is about 3660.8937433365. The cubic root of 13402143 is about 237.5334349974.

Adding to 13402143 its reverse (34120431), we get a palindrome (47522574).

The spelling of 13402143 in words is "thirteen million, four hundred two thousand, one hundred forty-three".