1212313 has 4 divisors (see below), whose sum is σ = 1221300. Its totient is φ = 1203328.

The previous prime is 1212301. The next prime is 1212319. The reversal of 1212313 is 3132121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 238144 + 974169 = 488^2 + 987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212313 is a prime.

It is a Duffinian number.

1212313 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1212293 and 1212302.

It is not an unprimeable number, because it can be changed into a prime (1212319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4288 + ... + 4561.

It is an arithmetic number, because the mean of its divisors is an integer number (305325).

2^1212313 is an apocalyptic number.

It is an amenable number.

1212313 is a deficient number, since it is larger than the sum of its proper divisors (8987).

1212313 is an equidigital number, since it uses as much as digits as its factorization.

1212313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8986.

The product of its digits is 36, while the sum is 13.

The square root of 1212313 is about 1101.0508616772. The cubic root of 1212313 is about 106.6280795756.

Adding to 1212313 its reverse (3132121), we get a palindrome (4344434).

The spelling of 1212313 in words is "one million, two hundred twelve thousand, three hundred thirteen".