571139 has 4 divisors (see below), whose sum is σ = 572880. Its totient is φ = 569400.

The previous prime is 571133. The next prime is 571147. The reversal of 571139 is 931175.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-571139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (571133) 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, 212 + ... + 1089.

It is an arithmetic number, because the mean of its divisors is an integer number (143220).

2⁵⁷¹¹³⁹ is an apocalyptic number.

571139 is a deficient number, since it is larger than the sum of its proper divisors (1741).

571139 is a wasteful number, since it uses less digits than its factorization.

571139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740.

The product of its digits is 945, while the sum is 26.

The square root of 571139 is about 755.7373882507. The cubic root of 571139 is about 82.9686338150.

The spelling of 571139 in words is "five hundred seventy-one thousand, one hundred thirty-nine".