1539143 has 4 divisors (see below), whose sum is σ = 1549488. Its totient is φ = 1528800.

The previous prime is 1539127. The next prime is 1539149. The reversal of 1539143 is 3419351.

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 1539143 - 2⁴ = 1539127 is a prime.

It is a super-2 number, since 2×1539143² = 4737922348898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1539149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4946 + ... + 5247.

It is an arithmetic number, because the mean of its divisors is an integer number (387372).

2^1539143 is an apocalyptic number.

1539143 is a deficient number, since it is larger than the sum of its proper divisors (10345).

1539143 is a wasteful number, since it uses less digits than its factorization.

1539143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10344.

The product of its digits is 1620, while the sum is 26.

The square root of 1539143 is about 1240.6220214070. The cubic root of 1539143 is about 115.4586097578.

The spelling of 1539143 in words is "one million, five hundred thirty-nine thousand, one hundred forty-three".