1321847 has 2 divisors, whose sum is σ = 1321848. Its totient is φ = 1321846.

The previous prime is 1321841. The next prime is 1321867. The reversal of 1321847 is 7481231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321847 - 2¹² = 1317751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660923 + 660924.

It is an arithmetic number, because the mean of its divisors is an integer number (660924).

2^1321847 is an apocalyptic number.

1321847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321847 is an equidigital number, since it uses as much as digits as its factorization.

1321847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 26.

The square root of 1321847 is about 1149.7160519015. The cubic root of 1321847 is about 109.7472710304.

The spelling of 1321847 in words is "one million, three hundred twenty-one thousand, eight hundred forty-seven".