1216973 has 2 divisors, whose sum is σ = 1216974. Its totient is φ = 1216972.

The previous prime is 1216961. The next prime is 1216987. The reversal of 1216973 is 3796121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 917764 + 299209 = 958^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216973 - 2⁸ = 1216717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608486 + 608487.

It is an arithmetic number, because the mean of its divisors is an integer number (608487).

2^1216973 is an apocalyptic number.

It is an amenable number.

1216973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216973 is an equidigital number, since it uses as much as digits as its factorization.

1216973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 1216973 is about 1103.1649921929. The cubic root of 1216973 is about 106.7645271617.

The spelling of 1216973 in words is "one million, two hundred sixteen thousand, nine hundred seventy-three".