1121947 has 2 divisors, whose sum is σ = 1121948. Its totient is φ = 1121946.

The previous prime is 1121941. The next prime is 1121987. The reversal of 1121947 is 7491211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121947 - 2⁷ = 1121819 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121941) 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 as a sum of consecutive naturals, namely, 560973 + 560974.

It is an arithmetic number, because the mean of its divisors is an integer number (560974).

2^1121947 is an apocalyptic number.

1121947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121947 is an equidigital number, since it uses as much as digits as its factorization.

1121947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 1121947 is about 1059.2199960348. The cubic root of 1121947 is about 103.9100244978.

The spelling of 1121947 in words is "one million, one hundred twenty-one thousand, nine hundred forty-seven".