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1223197 is a prime number
BaseRepresentation
bin100101010101000011101
32022010220121
410222220131
5303120242
642114541
713253113
oct4525035
92263817
101223197
11766008
124aba51
1333a9b1
1423bab3
15192667
hex12aa1d

1223197 has 2 divisors, whose sum is σ = 1223198. Its totient is φ = 1223196.

The previous prime is 1223179. The next prime is 1223203. The reversal of 1223197 is 7913221.

Together with previous prime (1223179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 972196 + 251001 = 986^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223197 - 215 = 1190429 is a prime.

It is equal to p94570 and since 1223197 and 94570 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611598 + 611599.

It is an arithmetic number, because the mean of its divisors is an integer number (611599).

21223197 is an apocalyptic number.

It is an amenable number.

1223197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223197 is an equidigital number, since it uses as much as digits as its factorization.

1223197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 1223197 is about 1105.9823687564. The cubic root of 1223197 is about 106.9462273848.

The spelling of 1223197 in words is "one million, two hundred twenty-three thousand, one hundred ninety-seven".