7538143 has 4 divisors (see below), whose sum is σ = 7629048. Its totient is φ = 7447240.

The previous prime is 7538099. The next prime is 7538147. The reversal of 7538143 is 3418357.

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 7538143 - 2²¹ = 5440991 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

7538143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7538147) 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, 45328 + ... + 45493.

It is an arithmetic number, because the mean of its divisors is an integer number (1907262).

Almost surely, 2^7538143 is an apocalyptic number.

7538143 is a deficient number, since it is larger than the sum of its proper divisors (90905).

7538143 is an equidigital number, since it uses as much as digits as its factorization.

7538143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90904.

The product of its digits is 10080, while the sum is 31.

The square root of 7538143 is about 2745.5678829707. The cubic root of 7538143 is about 196.0746539856.

The spelling of 7538143 in words is "seven million, five hundred thirty-eight thousand, one hundred forty-three".