1237213 has 2 divisors, whose sum is σ = 1237214. Its totient is φ = 1237212.

The previous prime is 1237211. The next prime is 1237217. The reversal of 1237213 is 3127321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1159929 + 77284 = 1077^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 1237213 - 2¹ = 1237211 is a prime.

Together with 1237211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1237211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618606 + 618607.

It is an arithmetic number, because the mean of its divisors is an integer number (618607).

2^1237213 is an apocalyptic number.

It is an amenable number.

1237213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1237213 is an equidigital number, since it uses as much as digits as its factorization.

1237213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 19.

The square root of 1237213 is about 1112.3007686772. The cubic root of 1237213 is about 107.3531580817.

The spelling of 1237213 in words is "one million, two hundred thirty-seven thousand, two hundred thirteen".