385557 has 4 divisors (see below), whose sum is σ = 514080. Its totient is φ = 257036.

The previous prime is 385537. The next prime is 385559. The reversal of 385557 is 755583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 755583 = 3 ⋅251861.

It is a cyclic number.

It is not a de Polignac number, because 385557 - 2⁶ = 385493 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 385557.

It is not an unprimeable number, because it can be changed into a prime (385559) 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, 64257 + ... + 64262.

It is an arithmetic number, because the mean of its divisors is an integer number (128520).

2³⁸⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

385557 is a deficient number, since it is larger than the sum of its proper divisors (128523).

385557 is a wasteful number, since it uses less digits than its factorization.

385557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128522.

The product of its digits is 21000, while the sum is 33.

The square root of 385557 is about 620.9323634664. The cubic root of 385557 is about 72.7829293187.

The spelling of 385557 in words is "three hundred eighty-five thousand, five hundred fifty-seven".