1331567 has 2 divisors, whose sum is σ = 1331568. Its totient is φ = 1331566.

The previous prime is 1331549. The next prime is 1331573. The reversal of 1331567 is 7651331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331567 - 2¹⁴ = 1315183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331527) 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, 665783 + 665784.

It is an arithmetic number, because the mean of its divisors is an integer number (665784).

2^1331567 is an apocalyptic number.

1331567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331567 is an equidigital number, since it uses as much as digits as its factorization.

1331567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 26.

The square root of 1331567 is about 1153.9354401352. The cubic root of 1331567 is about 110.0156176172.

Adding to 1331567 its reverse (7651331), we get a palindrome (8982898).

The spelling of 1331567 in words is "one million, three hundred thirty-one thousand, five hundred sixty-seven".