1373321 has 2 divisors, whose sum is σ = 1373322. Its totient is φ = 1373320.

The previous prime is 1373233. The next prime is 1373341. The reversal of 1373321 is 1233731.

It is a happy number.

It is an a-pointer prime, because the next prime (1373341) can be obtained adding 1373321 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1000000 + 373321 = 1000^2 + 611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1373321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1373293 and 1373302.

It is not a weakly prime, because it can be changed into another prime (1373341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686660 + 686661.

It is an arithmetic number, because the mean of its divisors is an integer number (686661).

2^1373321 is an apocalyptic number.

It is an amenable number.

1373321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373321 is an equidigital number, since it uses as much as digits as its factorization.

1373321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 20.

The square root of 1373321 is about 1171.8877932635. The cubic root of 1373321 is about 111.1537247287.

The spelling of 1373321 in words is "one million, three hundred seventy-three thousand, three hundred twenty-one".