1222147 has 16 divisors (see below), whose sum is σ = 1395360. Its totient is φ = 1064448.

The previous prime is 1222129. The next prime is 1222157. The reversal of 1222147 is 7412221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1222147 - 2⁷ = 1222019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18208 + ... + 18274.

It is an arithmetic number, because the mean of its divisors is an integer number (87210).

2^1222147 is an apocalyptic number.

1222147 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1222147 is a deficient number, since it is larger than the sum of its proper divisors (173213).

1222147 is a wasteful number, since it uses less digits than its factorization.

1222147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150.

The product of its digits is 224, while the sum is 19.

The square root of 1222147 is about 1105.5075757316. The cubic root of 1222147 is about 106.9156175198.

Adding to 1222147 its reverse (7412221), we get a palindrome (8634368).

It can be divided in two parts, 122214 and 7, that added together give a palindrome (122221).

The spelling of 1222147 in words is "one million, two hundred twenty-two thousand, one hundred forty-seven".