1331579 has 2 divisors, whose sum is σ = 1331580. Its totient is φ = 1331578.

The previous prime is 1331573. The next prime is 1331587. The reversal of 1331579 is 9751331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331579 - 2¹⁶ = 1266043 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1331573) 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, 665789 + 665790.

It is an arithmetic number, because the mean of its divisors is an integer number (665790).

2^1331579 is an apocalyptic number.

1331579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331579 is an equidigital number, since it uses as much as digits as its factorization.

1331579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2835, while the sum is 29.

The square root of 1331579 is about 1153.9406397211. The cubic root of 1331579 is about 110.0159481009.

The spelling of 1331579 in words is "one million, three hundred thirty-one thousand, five hundred seventy-nine".