1320947 has 2 divisors, whose sum is σ = 1320948. Its totient is φ = 1320946.

The previous prime is 1320931. The next prime is 1320961. The reversal of 1320947 is 7490231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1320947 - 2⁴ = 1320931 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1320247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660473 + 660474.

It is an arithmetic number, because the mean of its divisors is an integer number (660474).

2^1320947 is an apocalyptic number.

1320947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320947 is an equidigital number, since it uses as much as digits as its factorization.

1320947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 1320947 is about 1149.3245842668. The cubic root of 1320947 is about 109.7223576657.

The spelling of 1320947 in words is "one million, three hundred twenty thousand, nine hundred forty-seven".