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6672021 = 319117053
BaseRepresentation
bin11001011100111010010101
3110112222021220
4121130322111
53202001041
6355000553
7110465646
oct31347225
913488256
106672021
113847874
122299159
1314c7b55
14c596cd
158bbd66
hex65ce95

6672021 has 8 divisors (see below), whose sum is σ = 9364320. Its totient is φ = 4213872.

The previous prime is 6672019. The next prime is 6672067. The reversal of 6672021 is 1202766.

It is a happy number.

6672021 is nontrivially palindromic in base 6.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6672021 - 21 = 6672019 is a prime.

6672021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6671982 and 6672000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6673021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58470 + ... + 58583.

It is an arithmetic number, because the mean of its divisors is an integer number (1170540).

Almost surely, 26672021 is an apocalyptic number.

It is an amenable number.

6672021 is a deficient number, since it is larger than the sum of its proper divisors (2692299).

6672021 is a wasteful number, since it uses less digits than its factorization.

6672021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117075.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 6672021 is about 2583.0255515577. The cubic root of 6672021 is about 188.2575784988.

Adding to 6672021 its reverse (1202766), we get a palindrome (7874787).

The spelling of 6672021 in words is "six million, six hundred seventy-two thousand, twenty-one".

Divisors: 1 3 19 57 117053 351159 2224007 6672021