Base | Representation |
---|---|
bin | 111101101011010001001 |
3 | 10210200021220 |
4 | 13231122021 |
5 | 1004133001 |
6 | 111152253 |
7 | 23115063 |
oct | 7553211 |
9 | 3720256 |
10 | 2021001 |
11 | 1160454 |
12 | 815689 |
13 | 559b78 |
14 | 3a8733 |
15 | 29dc36 |
hex | 1ed689 |
2021001 has 4 divisors (see below), whose sum is σ = 2694672. Its totient is φ = 1347332.
The previous prime is 2020999. The next prime is 2021003. The reversal of 2021001 is 1001202.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is an interprime number because it is at equal distance from previous prime (2020999) and next prime (2021003).
It is a cyclic number.
It is not a de Polignac number, because 2021001 - 21 = 2020999 is a prime.
It is a D-number.
It is a nialpdrome in base 8.
It is not an unprimeable number, because it can be changed into a prime (2021003) 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, 336831 + ... + 336836.
It is an arithmetic number, because the mean of its divisors is an integer number (673668).
22021001 is an apocalyptic number.
It is an amenable number.
2021001 is a deficient number, since it is larger than the sum of its proper divisors (673671).
2021001 is an equidigital number, since it uses as much as digits as its factorization.
2021001 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 673670.
The product of its (nonzero) digits is 4, while the sum is 6.
The square root of 2021001 is about 1421.6191473106. The cubic root of 2021001 is about 126.4315637473.
Adding to 2021001 its reverse (1001202), we get a palindrome (3022203).
It can be divided in two parts, 202 and 1001, that multiplied together give a palindrome (202202).
The spelling of 2021001 in words is "two million, twenty-one thousand, one".
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