1320437 has 2 divisors, whose sum is σ = 1320438. Its totient is φ = 1320436.

The previous prime is 1320433. The next prime is 1320533. The reversal of 1320437 is 7340231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 45796 = 1129^2 + 214^2 .

It is an emirp because it is prime and its reverse (7340231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320437 - 2² = 1320433 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320433) 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, 660218 + 660219.

It is an arithmetic number, because the mean of its divisors is an integer number (660219).

2^1320437 is an apocalyptic number.

It is an amenable number.

1320437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320437 is an equidigital number, since it uses as much as digits as its factorization.

1320437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 1320437 is about 1149.1026934091. The cubic root of 1320437 is about 109.7082350689.

Adding to 1320437 its reverse (7340231), we get a palindrome (8660668).

The spelling of 1320437 in words is "one million, three hundred twenty thousand, four hundred thirty-seven".