1212613 has 2 divisors, whose sum is σ = 1212614. Its totient is φ = 1212612.

The previous prime is 1212611. The next prime is 1212641. The reversal of 1212613 is 3162121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 917764 + 294849 = 958^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212613 - 2¹ = 1212611 is a prime.

Together with 1212611, it forms a pair of twin primes.

1212613 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212611) 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, 606306 + 606307.

It is an arithmetic number, because the mean of its divisors is an integer number (606307).

2^1212613 is an apocalyptic number.

It is an amenable number.

1212613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212613 is an equidigital number, since it uses as much as digits as its factorization.

1212613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 16.

The square root of 1212613 is about 1101.1870867387. The cubic root of 1212613 is about 106.6368742751.

Adding to 1212613 its reverse (3162121), we get a palindrome (4374734).

The spelling of 1212613 in words is "one million, two hundred twelve thousand, six hundred thirteen".