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1222145 = 5244429
BaseRepresentation
bin100101010011000000001
32022002110122
410222120001
5303102040
642110025
713250051
oct4523001
92262418
101222145
11765241
124ab315
1333a382
1423b561
151921b5
hex12a601

1222145 has 4 divisors (see below), whose sum is σ = 1466580. Its totient is φ = 977712.

The previous prime is 1222129. The next prime is 1222157. The reversal of 1222145 is 5412221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5412221 = 47911299.

It can be written as a sum of positive squares in 2 ways, for example, as 678976 + 543169 = 824^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222145 - 24 = 1222129 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 122210 + ... + 122219.

It is an arithmetic number, because the mean of its divisors is an integer number (366645).

21222145 is an apocalyptic number.

It is an amenable number.

1222145 is a deficient number, since it is larger than the sum of its proper divisors (244435).

1222145 is an equidigital number, since it uses as much as digits as its factorization.

1222145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244434.

The product of its digits is 160, while the sum is 17.

The square root of 1222145 is about 1105.5066711694. The cubic root of 1222145 is about 106.9155591985.

Adding to 1222145 its reverse (5412221), we get a palindrome (6634366).

It can be divided in two parts, 12221 and 45, that multiplied together give a palindrome (549945).

The spelling of 1222145 in words is "one million, two hundred twenty-two thousand, one hundred forty-five".

Divisors: 1 5 244429 1222145