1212947 has 4 divisors (see below), whose sum is σ = 1215840. Its totient is φ = 1210056.

The previous prime is 1212943. The next prime is 1212973. The reversal of 1212947 is 7492121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212947 - 2² = 1212943 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212943) by changing a digit.

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, 683 + ... + 1700.

It is an arithmetic number, because the mean of its divisors is an integer number (303960).

2^1212947 is an apocalyptic number.

1212947 is a deficient number, since it is larger than the sum of its proper divisors (2893).

1212947 is an equidigital number, since it uses as much as digits as its factorization.

1212947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892.

The product of its digits is 1008, while the sum is 26.

The square root of 1212947 is about 1101.3387308181. The cubic root of 1212947 is about 106.6466640010.

The spelling of 1212947 in words is "one million, two hundred twelve thousand, nine hundred forty-seven".