1491947 has 2 divisors, whose sum is σ = 1491948. Its totient is φ = 1491946.

The previous prime is 1491943. The next prime is 1491953. The reversal of 1491947 is 7491941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1491947 - 2² = 1491943 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1491943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745973 + 745974.

It is an arithmetic number, because the mean of its divisors is an integer number (745974).

2^1491947 is an apocalyptic number.

1491947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491947 is an equidigital number, since it uses as much as digits as its factorization.

1491947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 1491947 is about 1221.4528234852. The cubic root of 1491947 is about 114.2662035890.

The spelling of 1491947 in words is "one million, four hundred ninety-one thousand, nine hundred forty-seven".