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421212 = 223113191
BaseRepresentation
bin1100110110101011100
3210101210110
41212311130
5101434322
613010020
73403011
oct1466534
9711713
10421212
11268510
12183910
1311994c
14ad708
1584c0c
hex66d5c

421212 has 24 divisors (see below), whose sum is σ = 1072512. Its totient is φ = 127600.

The previous prime is 421207. The next prime is 421241. The reversal of 421212 is 212124.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

421212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1464 + ... + 1727.

It is an arithmetic number, because the mean of its divisors is an integer number (44688).

2421212 is an apocalyptic number.

It is an amenable number.

421212 is an abundant number, since it is smaller than the sum of its proper divisors (651300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421212 is a wasteful number, since it uses less digits than its factorization.

421212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209 (or 3207 counting only the distinct ones).

The product of its digits is 32, while the sum is 12.

The square root of 421212 is about 649.0084745209. The cubic root of 421212 is about 74.9606905116.

Adding to 421212 its reverse (212124), we get a palindrome (633336).

It can be divided in two parts, 4212 and 12, that added together give a palindrome (4224).

The spelling of 421212 in words is "four hundred twenty-one thousand, two hundred twelve", and thus it is an iban number.

Divisors: 1 2 3 4 6 11 12 22 33 44 66 132 3191 6382 9573 12764 19146 35101 38292 70202 105303 140404 210606 421212