13642743 has 4 divisors (see below), whose sum is σ = 18190328. Its totient is φ = 9095160.

The previous prime is 13642723. The next prime is 13642753. The reversal of 13642743 is 34724631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34724631 = 3 ⋅11574877.

It is not a de Polignac number, because 13642743 - 2⁹ = 13642231 is a prime.

It is a super-2 number, since 2×13642743² = 372248873128098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13642743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13642723) 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, 2273788 + ... + 2273793.

It is an arithmetic number, because the mean of its divisors is an integer number (4547582).

Almost surely, 2^13642743 is an apocalyptic number.

13642743 is a deficient number, since it is larger than the sum of its proper divisors (4547585).

13642743 is an equidigital number, since it uses as much as digits as its factorization.

13642743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547584.

The product of its digits is 12096, while the sum is 30.

The square root of 13642743 is about 3693.6083983010. The cubic root of 13642743 is about 238.9464408500.

The spelling of 13642743 in words is "thirteen million, six hundred forty-two thousand, seven hundred forty-three".