1321447 has 2 divisors, whose sum is σ = 1321448. Its totient is φ = 1321446.

The previous prime is 1321429. The next prime is 1321451. The reversal of 1321447 is 7441231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321447 - 2⁷ = 1321319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321417) 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, 660723 + 660724.

It is an arithmetic number, because the mean of its divisors is an integer number (660724).

2^1321447 is an apocalyptic number.

1321447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321447 is an equidigital number, since it uses as much as digits as its factorization.

1321447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 22.

The square root of 1321447 is about 1149.5420827443. The cubic root of 1321447 is about 109.7361998204.

Adding to 1321447 its reverse (7441231), we get a palindrome (8762678).

The spelling of 1321447 in words is "one million, three hundred twenty-one thousand, four hundred forty-seven".