398571 has 4 divisors (see below), whose sum is σ = 531432. Its totient is φ = 265712.

The previous prime is 398569. The next prime is 398581. The reversal of 398571 is 175893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175893 = 3 ⋅58631.

It is a cyclic number.

It is not a de Polignac number, because 398571 - 2¹ = 398569 is a prime.

It is a D-number.

398571 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (398581) 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, 66426 + ... + 66431.

It is an arithmetic number, because the mean of its divisors is an integer number (132858).

2³⁹⁸⁵⁷¹ is an apocalyptic number.

398571 is a deficient number, since it is larger than the sum of its proper divisors (132861).

398571 is a wasteful number, since it uses less digits than its factorization.

398571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132860.

The product of its digits is 7560, while the sum is 33.

The square root of 398571 is about 631.3247975488. The cubic root of 398571 is about 73.5927839294.

It can be divided in two parts, 398 and 571, that added together give a palindrome (969).

The spelling of 398571 in words is "three hundred ninety-eight thousand, five hundred seventy-one".