1213573 has 2 divisors, whose sum is σ = 1213574. Its totient is φ = 1213572.

The previous prime is 1213561. The next prime is 1213577. The reversal of 1213573 is 3753121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1170724 + 42849 = 1082^2 + 207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213577) 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 as a sum of consecutive naturals, namely, 606786 + 606787.

It is an arithmetic number, because the mean of its divisors is an integer number (606787).

2^1213573 is an apocalyptic number.

It is an amenable number.

1213573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213573 is an equidigital number, since it uses as much as digits as its factorization.

1213573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 22.

The square root of 1213573 is about 1101.6228937345. The cubic root of 1213573 is about 106.6650075697.

Adding to 1213573 its reverse (3753121), we get a palindrome (4966694).

The spelling of 1213573 in words is "one million, two hundred thirteen thousand, five hundred seventy-three".