1447891 has 2 divisors, whose sum is σ = 1447892. Its totient is φ = 1447890.

The previous prime is 1447889. The next prime is 1447913. The reversal of 1447891 is 1987441.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1447891 - 2¹ = 1447889 is a prime.

Together with 1447889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1447811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 723945 + 723946.

It is an arithmetic number, because the mean of its divisors is an integer number (723946).

2^1447891 is an apocalyptic number.

1447891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1447891 is an equidigital number, since it uses as much as digits as its factorization.

1447891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 1447891 is about 1203.2834246344. The cubic root of 1447891 is about 113.1302177014.

The spelling of 1447891 in words is "one million, four hundred forty-seven thousand, eight hundred ninety-one".