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1221299 is a prime number
BaseRepresentation
bin100101010001010110011
32022001022022
410222022303
5303040144
642102055
713244432
oct4521263
92261268
101221299
11764642
124aa92b
13339b81
1423b119
15191cee
hex12a2b3

1221299 has 2 divisors, whose sum is σ = 1221300. Its totient is φ = 1221298.

The previous prime is 1221289. The next prime is 1221373. The reversal of 1221299 is 9921221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1221299 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1221239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610649 + 610650.

It is an arithmetic number, because the mean of its divisors is an integer number (610650).

21221299 is an apocalyptic number.

1221299 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221299 is an equidigital number, since it uses as much as digits as its factorization.

1221299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The square root of 1221299 is about 1105.1239749458. The cubic root of 1221299 is about 106.8908836099.

The spelling of 1221299 in words is "one million, two hundred twenty-one thousand, two hundred ninety-nine".