1047391 has 2 divisors, whose sum is σ = 1047392. Its totient is φ = 1047390.

The previous prime is 1047379. The next prime is 1047419. The reversal of 1047391 is 1937401.

It is a weak prime.

It is an emirp because it is prime and its reverse (1937401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1047391 - 2¹⁷ = 916319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1047311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523695 + 523696.

It is an arithmetic number, because the mean of its divisors is an integer number (523696).

2^1047391 is an apocalyptic number.

1047391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1047391 is an equidigital number, since it uses as much as digits as its factorization.

1047391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1047391 is about 1023.4212231530. The cubic root of 1047391 is about 101.5553824282. Note that the first 3 decimals are identical.

The spelling of 1047391 in words is "one million, forty-seven thousand, three hundred ninety-one".