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BaseRepresentation
bin100101010100011101001
32022010111012
410222203221
5303113024
642113305
713252163
oct4524351
92263435
101222889
11765858
124ab835
1333a805
1423b933
1519250e
hex12a8e9

1222889 has 2 divisors, whose sum is σ = 1222890. Its totient is φ = 1222888.

The previous prime is 1222853. The next prime is 1222909. The reversal of 1222889 is 9882221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 652864 + 570025 = 808^2 + 755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222889 - 28 = 1222633 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1222829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611444 + 611445.

It is an arithmetic number, because the mean of its divisors is an integer number (611445).

21222889 is an apocalyptic number.

It is an amenable number.

1222889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222889 is an equidigital number, since it uses as much as digits as its factorization.

1222889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 1222889 is about 1105.8431172639. The cubic root of 1222889 is about 106.9372503072.

The spelling of 1222889 in words is "one million, two hundred twenty-two thousand, eight hundred eighty-nine".