601821 has 12 divisors (see below), whose sum is σ = 948480. Its totient is φ = 364680.

The previous prime is 601819. The next prime is 601823. The reversal of 601821 is 128106.

It is an interprime number because it is at equal distance from previous prime (601819) and next prime (601823).

It is not a de Polignac number, because 601821 - 2¹ = 601819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 601794 and 601803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2941 + ... + 3138.

It is an arithmetic number, because the mean of its divisors is an integer number (79040).

2⁶⁰¹⁸²¹ is an apocalyptic number.

It is an amenable number.

601821 is a deficient number, since it is larger than the sum of its proper divisors (346659).

601821 is a wasteful number, since it uses less digits than its factorization.

601821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6096 (or 6093 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 601821 is about 775.7712291649. The cubic root of 601821 is about 84.4285076240.

Adding to 601821 its reverse (128106), we get a palindrome (729927).

It can be divided in two parts, 60 and 1821, that added together give a palindrome (1881).

The spelling of 601821 in words is "six hundred one thousand, eight hundred twenty-one".