385642 has 16 divisors (see below), whose sum is σ = 613800. Its totient is φ = 181440.

The previous prime is 385639. The next prime is 385657. The reversal of 385642 is 246583.

It is a Cunningham number, because it is equal to 621²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 269361 + 116281 = 519^2 + 341^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 385642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3484 + ... + 3592.

2³⁸⁵⁶⁴² is an apocalyptic number.

385642 is a deficient number, since it is larger than the sum of its proper divisors (228158).

385642 is a wasteful number, since it uses less digits than its factorization.

385642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201.

The product of its digits is 5760, while the sum is 28.

The square root of 385642 is about 621.0008051525. Note that the first 3 decimals coincide. The cubic root of 385642 is about 72.7882775071.

The spelling of 385642 in words is "three hundred eighty-five thousand, six hundred forty-two".