1121147 has 2 divisors, whose sum is σ = 1121148. Its totient is φ = 1121146.

The previous prime is 1121143. The next prime is 1121173. The reversal of 1121147 is 7411211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121147 - 2² = 1121143 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1121143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560573 + 560574.

It is an arithmetic number, because the mean of its divisors is an integer number (560574).

2^1121147 is an apocalyptic number.

1121147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121147 is an equidigital number, since it uses as much as digits as its factorization.

1121147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56, while the sum is 17.

The square root of 1121147 is about 1058.8422923174. The cubic root of 1121147 is about 103.8853210773.

Adding to 1121147 its reverse (7411211), we get a palindrome (8532358).

Subtracting 1121147 from its reverse (7411211), we obtain a square (6290064 = 2508²).

The spelling of 1121147 in words is "one million, one hundred twenty-one thousand, one hundred forty-seven".