557405 has 16 divisors (see below), whose sum is σ = 722304. Its totient is φ = 411840.

The previous prime is 557377. The next prime is 557423. The reversal of 557405 is 504755.

It is not a de Polignac number, because 557405 - 2¹² = 553309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4190 + ... + 4320.

It is an arithmetic number, because the mean of its divisors is an integer number (45144).

2⁵⁵⁷⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

557405 is a deficient number, since it is larger than the sum of its proper divisors (164899).

557405 is a wasteful number, since it uses less digits than its factorization.

557405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196.

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 557405 is about 746.5956067377. The cubic root of 557405 is about 82.2981905490.

Subtracting from 557405 its reverse (504755), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 557405 in words is "five hundred fifty-seven thousand, four hundred five".