2000421 has 6 divisors (see below), whose sum is σ = 2889510. Its totient is φ = 1333608.

The previous prime is 2000417. The next prime is 2000423. The reversal of 2000421 is 1240002.

It can be written as a sum of positive squares in only one way, i.e., 1988100 + 12321 = 1410^2 + 111^2 .

It is not a de Polignac number, because 2000421 - 2² = 2000417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 222269 = 2000421 / (2 + 0 + 0 + 0 + 4 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111126 + ... + 111143.

It is an arithmetic number, because the mean of its divisors is an integer number (481585).

2^2000421 is an apocalyptic number.

It is an amenable number.

2000421 is a deficient number, since it is larger than the sum of its proper divisors (889089).

2000421 is a wasteful number, since it uses less digits than its factorization.

2000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222275 (or 222272 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 2000421 is about 1414.3624005183. The cubic root of 2000421 is about 126.0009448153. Note that the first 3 decimals are identical.

Adding to 2000421 its reverse (1240002), we get a palindrome (3240423).

The spelling of 2000421 in words is "two million, four hundred twenty-one", and thus it is an aban number.