557239 has 4 divisors (see below), whose sum is σ = 565624. Its totient is φ = 548856.

The previous prime is 557201. The next prime is 557261. The reversal of 557239 is 932755.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 932755 = 5 ⋅186551.

It is a cyclic number.

It is not a de Polignac number, because 557239 - 2⁹ = 556727 is a prime.

It is a Duffinian number.

557239 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 557239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557269) 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, 4092 + ... + 4225.

It is an arithmetic number, because the mean of its divisors is an integer number (141406).

2⁵⁵⁷²³⁹ is an apocalyptic number.

557239 is a deficient number, since it is larger than the sum of its proper divisors (8385).

557239 is an equidigital number, since it uses as much as digits as its factorization.

557239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8384.

The product of its digits is 9450, while the sum is 31.

The square root of 557239 is about 746.4844271651. The cubic root of 557239 is about 82.2900200351.

The spelling of 557239 in words is "five hundred fifty-seven thousand, two hundred thirty-nine".