1216147 has 2 divisors, whose sum is σ = 1216148. Its totient is φ = 1216146.

The previous prime is 1216123. The next prime is 1216151. The reversal of 1216147 is 7416121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216147 is a prime.

It is an Ulam number.

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

It is not a weakly prime, because it can be changed into another prime (1216177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608073 + 608074.

It is an arithmetic number, because the mean of its divisors is an integer number (608074).

2^1216147 is an apocalyptic number.

1216147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216147 is an equidigital number, since it uses as much as digits as its factorization.

1216147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 1216147 is about 1102.7905512834. The cubic root of 1216147 is about 106.7403668177.

The spelling of 1216147 in words is "one million, two hundred sixteen thousand, one hundred forty-seven".