1523143 has 4 divisors (see below), whose sum is σ = 1525680. Its totient is φ = 1520608.

The previous prime is 1523141. The next prime is 1523153. The reversal of 1523143 is 3413251.

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 1523143 - 2¹ = 1523141 is a prime.

It is a Duffinian number.

1523143 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1523143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523141) 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, 198 + ... + 1756.

It is an arithmetic number, because the mean of its divisors is an integer number (381420).

2^1523143 is an apocalyptic number.

1523143 is a deficient number, since it is larger than the sum of its proper divisors (2537).

1523143 is an equidigital number, since it uses as much as digits as its factorization.

1523143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its digits is 360, while the sum is 19.

The square root of 1523143 is about 1234.1567971696. The cubic root of 1523143 is about 115.0571360693.

Adding to 1523143 its reverse (3413251), we get a palindrome (4936394).

The spelling of 1523143 in words is "one million, five hundred twenty-three thousand, one hundred forty-three".