385421 has 4 divisors (see below), whose sum is σ = 387612. Its totient is φ = 383232.

The previous prime is 385417. The next prime is 385433. The reversal of 385421 is 124583.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42025 + 343396 = 205^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 385421 - 2² = 385417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385471) 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, 806 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (96903).

2³⁸⁵⁴²¹ is an apocalyptic number.

It is an amenable number.

385421 is a deficient number, since it is larger than the sum of its proper divisors (2191).

385421 is a wasteful number, since it uses less digits than its factorization.

385421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190.

The product of its digits is 960, while the sum is 23.

The square root of 385421 is about 620.8228410746. The cubic root of 385421 is about 72.7743705821.

The spelling of 385421 in words is "three hundred eighty-five thousand, four hundred twenty-one".