557491 has 8 divisors (see below), whose sum is σ = 619200. Its totient is φ = 497640.

The previous prime is 557489. The next prime is 557519. The reversal of 557491 is 194755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 557491 - 2¹ = 557489 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (557461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220 + ... + 1078.

It is an arithmetic number, because the mean of its divisors is an integer number (77400).

2⁵⁵⁷⁴⁹¹ is an apocalyptic number.

557491 is a deficient number, since it is larger than the sum of its proper divisors (61709).

557491 is a wasteful number, since it uses less digits than its factorization.

557491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929.

The product of its digits is 6300, while the sum is 31.

The square root of 557491 is about 746.6531992833. The cubic root of 557491 is about 82.3024228280.

It can be divided in two parts, 5574 and 91, that added together give a palindrome (5665).

The spelling of 557491 in words is "five hundred fifty-seven thousand, four hundred ninety-one".