Search a number
1223138 = 2731783
BaseRepresentation
bin100101010100111100010
32022010211102
410222213202
5303120023
642114402
713253000
oct4524742
92263742
101223138
11765a64
124aba02
1333a967
1423ba70
15192628
hex12a9e2

1223138 has 16 divisors (see below), whose sum is σ = 2140800. Its totient is φ = 523908.

The previous prime is 1223119. The next prime is 1223149. The reversal of 1223138 is 8313221.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206 + ... + 1577.

It is an arithmetic number, because the mean of its divisors is an integer number (133800).

21223138 is an apocalyptic number.

1223138 is a deficient number, since it is larger than the sum of its proper divisors (917662).

1223138 is an equidigital number, since it uses as much as digits as its factorization.

1223138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1792 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 1223138 is about 1105.9556953151. The cubic root of 1223138 is about 106.9445078665.

Adding to 1223138 its reverse (8313221), we get a palindrome (9536359).

The spelling of 1223138 in words is "one million, two hundred twenty-three thousand, one hundred thirty-eight".