557645 has 8 divisors (see below), whose sum is σ = 730080. Its totient is φ = 405520.

The previous prime is 557639. The next prime is 557663. The reversal of 557645 is 546755.

It is a happy number.

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

It is not a de Polignac number, because 557645 - 2¹² = 553549 is a prime.

It is a super-3 number, since 3×557645³ = 520229160783333375, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5015 + ... + 5124.

It is an arithmetic number, because the mean of its divisors is an integer number (91260).

2⁵⁵⁷⁶⁴⁵ is an apocalyptic number.

557645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

557645 is a deficient number, since it is larger than the sum of its proper divisors (172435).

557645 is a wasteful number, since it uses less digits than its factorization.

557645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155.

The product of its digits is 21000, while the sum is 32.

The square root of 557645 is about 746.7563190225. The cubic root of 557645 is about 82.3100004728.

The spelling of 557645 in words is "five hundred fifty-seven thousand, six hundred forty-five".