7145543 has 4 divisors (see below), whose sum is σ = 7225920. Its totient is φ = 7065168.

The previous prime is 7145533. The next prime is 7145557. The reversal of 7145543 is 3455417.

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 7145543 - 2⁴ = 7145527 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 (7145503) 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, 40055 + ... + 40232.

It is an arithmetic number, because the mean of its divisors is an integer number (1806480).

Almost surely, 2^7145543 is an apocalyptic number.

7145543 is a deficient number, since it is larger than the sum of its proper divisors (80377).

7145543 is an equidigital number, since it uses as much as digits as its factorization.

7145543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80376.

The product of its digits is 8400, while the sum is 29.

The square root of 7145543 is about 2673.1148497586. The cubic root of 7145543 is about 192.6098142195.

The spelling of 7145543 in words is "seven million, one hundred forty-five thousand, five hundred forty-three".