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1312229 is a prime number
BaseRepresentation
bin101000000010111100101
32110200001002
411000113211
5313442404
644043045
714103512
oct5002745
92420032
101312229
11816996
12533485
1336c389
14262309
151adc1e
hex1405e5

1312229 has 2 divisors, whose sum is σ = 1312230. Its totient is φ = 1312228.

The previous prime is 1312211. The next prime is 1312237. The reversal of 1312229 is 9222131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221025 + 91204 = 1105^2 + 302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1312229 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656114 + 656115.

It is an arithmetic number, because the mean of its divisors is an integer number (656115).

21312229 is an apocalyptic number.

It is an amenable number.

1312229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312229 is an equidigital number, since it uses as much as digits as its factorization.

1312229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 1312229 is about 1145.5256435366. The cubic root of 1312229 is about 109.4804424249.

The spelling of 1312229 in words is "one million, three hundred twelve thousand, two hundred twenty-nine".