1122147 has 32 divisors (see below), whose sum is σ = 1881600. Its totient is φ = 655776.

The previous prime is 1122139. The next prime is 1122157. The reversal of 1122147 is 7412211.

It is not a de Polignac number, because 1122147 - 2³ = 1122139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8004 + ... + 8142.

It is an arithmetic number, because the mean of its divisors is an integer number (58800).

2^1122147 is an apocalyptic number.

1122147 is a deficient number, since it is larger than the sum of its proper divisors (759453).

1122147 is a wasteful number, since it uses less digits than its factorization.

1122147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 178 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 1122147 is about 1059.3144009217. The cubic root of 1122147 is about 103.9161985179.

Adding to 1122147 its reverse (7412211), we get a palindrome (8534358).

Subtracting 1122147 from its reverse (7412211), we obtain a square (6290064 = 2508²).

The spelling of 1122147 in words is "one million, one hundred twenty-two thousand, one hundred forty-seven".