557409 has 16 divisors (see below), whose sum is σ = 792000. Its totient is φ = 348096.

The previous prime is 557377. The next prime is 557423. The reversal of 557409 is 904755.

It is not a de Polignac number, because 557409 - 2⁵ = 557377 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3667 + ... + 3815.

It is an arithmetic number, because the mean of its divisors is an integer number (49500).

2⁵⁵⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

557409 is a deficient number, since it is larger than the sum of its proper divisors (234591).

557409 is a wasteful number, since it uses less digits than its factorization.

557409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 557409 is about 746.5982855592. The cubic root of 557409 is about 82.2983874089.

The spelling of 557409 in words is "five hundred fifty-seven thousand, four hundred nine".