557257 has 4 divisors (see below), whose sum is σ = 572356. Its totient is φ = 542160.

The previous prime is 557201. The next prime is 557261. The reversal of 557257 is 752755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752755 = 5 ⋅150551.

It can be written as a sum of positive squares in 2 ways, for example, as 467856 + 89401 = 684^2 + 299^2 .

It is a cyclic number.

It is not a de Polignac number, because 557257 - 2¹¹ = 555209 is a prime.

It is a Duffinian number.

557257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (557057) 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, 7494 + ... + 7567.

It is an arithmetic number, because the mean of its divisors is an integer number (143089).

2⁵⁵⁷²⁵⁷ is an apocalyptic number.

It is an amenable number.

557257 is a deficient number, since it is larger than the sum of its proper divisors (15099).

557257 is a wasteful number, since it uses less digits than its factorization.

557257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15098.

The product of its digits is 12250, while the sum is 31.

The square root of 557257 is about 746.4964835818. The cubic root of 557257 is about 82.2909060728.

The spelling of 557257 in words is "five hundred fifty-seven thousand, two hundred fifty-seven".