557407 has 4 divisors (see below), whose sum is σ = 563760. Its totient is φ = 551056.

The previous prime is 557377. The next prime is 557423. The reversal of 557407 is 704755.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 557407 - 2¹⁹ = 33119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551407) 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, 3043 + ... + 3220.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2⁵⁵⁷⁴⁰⁷ is an apocalyptic number.

557407 is a deficient number, since it is larger than the sum of its proper divisors (6353).

557407 is an equidigital number, since it uses as much as digits as its factorization.

557407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 557407 is about 746.5969461497. The cubic root of 557407 is about 82.2982889791.

The spelling of 557407 in words is "five hundred fifty-seven thousand, four hundred seven".