1213873 has 2 divisors, whose sum is σ = 1213874. Its totient is φ = 1213872.

The previous prime is 1213841. The next prime is 1213879. The reversal of 1213873 is 3783121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 935089 + 278784 = 967^2 + 528^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213873 - 2⁵ = 1213841 is a prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (1213879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606936 + 606937.

It is an arithmetic number, because the mean of its divisors is an integer number (606937).

2^1213873 is an apocalyptic number.

It is an amenable number.

1213873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213873 is an equidigital number, since it uses as much as digits as its factorization.

1213873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 1213873 is about 1101.7590480681. The cubic root of 1213873 is about 106.6737961814.

Adding to 1213873 its reverse (3783121), we get a palindrome (4996994).

The spelling of 1213873 in words is "one million, two hundred thirteen thousand, eight hundred seventy-three".