1320541 has 2 divisors, whose sum is σ = 1320542. Its totient is φ = 1320540.

The previous prime is 1320533. The next prime is 1320607. The reversal of 1320541 is 1450231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1313316 + 7225 = 1146^2 + 85^2 .

It is an emirp because it is prime and its reverse (1450231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320541 - 2³ = 1320533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660270 + 660271.

It is an arithmetic number, because the mean of its divisors is an integer number (660271).

2^1320541 is an apocalyptic number.

It is an amenable number.

1320541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320541 is an equidigital number, since it uses as much as digits as its factorization.

1320541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1320541 is about 1149.1479452185. The cubic root of 1320541 is about 109.7111152661.

Adding to 1320541 its reverse (1450231), we get a palindrome (2770772).

The spelling of 1320541 in words is "one million, three hundred twenty thousand, five hundred forty-one".