385021 has 8 divisors (see below), whose sum is σ = 473984. Its totient is φ = 304560.

The previous prime is 385013. The next prime is 385027. The reversal of 385021 is 120583.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 385021 - 2³ = 385013 is a prime.

It is the 621-st Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 385021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385027) by changing a digit.

It is a nontrivial repunit in base 620.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2025 + ... + 2206.

It is an arithmetic number, because the mean of its divisors is an integer number (59248).

2³⁸⁵⁰²¹ is an apocalyptic number.

It is an amenable number.

385021 is a deficient number, since it is larger than the sum of its proper divisors (88963).

385021 is a wasteful number, since it uses less digits than its factorization.

385021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 385021 is about 620.5006043510. The cubic root of 385021 is about 72.7491861523.

It can be divided in two parts, 38502 and 1, that added together give a triangular number (38503 = T₂₇₇).

The spelling of 385021 in words is "three hundred eighty-five thousand, twenty-one".