13405143 has 8 divisors (see below), whose sum is σ = 17948656. Its totient is φ = 8899200.

The previous prime is 13405123. The next prime is 13405151. The reversal of 13405143 is 34150431.

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

It is not a de Polignac number, because 13405143 - 2⁵ = 13405111 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 (13405103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8548 + ... + 9993.

It is an arithmetic number, because the mean of its divisors is an integer number (2243582).

Almost surely, 2^13405143 is an apocalyptic number.

13405143 is a deficient number, since it is larger than the sum of its proper divisors (4543513).

13405143 is a wasteful number, since it uses less digits than its factorization.

13405143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18785.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13405143 is about 3661.3034564210. The cubic root of 13405143 is about 237.5511572164.

Adding to 13405143 its reverse (34150431), we get a palindrome (47555574).

The spelling of 13405143 in words is "thirteen million, four hundred five thousand, one hundred forty-three".