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1220222 = 23119681
BaseRepresentation
bin100101001111001111110
32021222211102
410221321332
5303021342
642053102
713241333
oct4517176
92258742
101220222
11763853
124aa192
13339533
1423a98a
15191832
hex129e7e

1220222 has 8 divisors (see below), whose sum is σ = 1889472. Its totient is φ = 590400.

The previous prime is 1220203. The next prime is 1220239. The reversal of 1220222 is 2220221.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9779 + ... + 9902.

It is an arithmetic number, because the mean of its divisors is an integer number (236184).

21220222 is an apocalyptic number.

1220222 is a deficient number, since it is larger than the sum of its proper divisors (669250).

1220222 is a wasteful number, since it uses less digits than its factorization.

1220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19714.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1220222 is about 1104.6365918256. The cubic root of 1220222 is about 106.8594538677.

Adding to 1220222 its reverse (2220221), we get a palindrome (3440443).

Subtracting 1220222 from its reverse (2220221), we obtain a palindrome (999999).

The spelling of 1220222 in words is "one million, two hundred twenty thousand, two hundred twenty-two".

Divisors: 1 2 31 62 19681 39362 610111 1220222