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1247243 is a prime number
BaseRepresentation
bin100110000100000001011
32100100220012
410300200023
5304402433
642422135
713413164
oct4604013
92310805
101247243
11782088
1250194b
1334891a
1424676b
15199848
hex13080b

1247243 has 2 divisors, whose sum is σ = 1247244. Its totient is φ = 1247242.

The previous prime is 1247231. The next prime is 1247263. The reversal of 1247243 is 3427421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1247243 - 212 = 1243147 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 1 + 211 + 48 + 7 + 217 + 410 + 3 .

It is equal to p96260 and since 1247243 and 96260 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1247263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623621 + 623622.

It is an arithmetic number, because the mean of its divisors is an integer number (623622).

21247243 is an apocalyptic number.

1247243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247243 is an equidigital number, since it uses as much as digits as its factorization.

1247243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 23.

The square root of 1247243 is about 1116.8003402578. The cubic root of 1247243 is about 107.6424791853.

The spelling of 1247243 in words is "one million, two hundred forty-seven thousand, two hundred forty-three".