1043391 has 16 divisors (see below), whose sum is σ = 1468800. Its totient is φ = 657888.

The previous prime is 1043377. The next prime is 1043401. The reversal of 1043391 is 1933401.

It is not a de Polignac number, because 1043391 - 2¹¹ = 1041343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043311) 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 in 15 ways as a sum of consecutive naturals, for example, 5740 + ... + 5918.

It is an arithmetic number, because the mean of its divisors is an integer number (91800).

2^1043391 is an apocalyptic number.

1043391 is a deficient number, since it is larger than the sum of its proper divisors (425409).

1043391 is a wasteful number, since it uses less digits than its factorization.

1043391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1043391 is about 1021.4651242211. The cubic root of 1043391 is about 101.4259370567.

Adding to 1043391 its reverse (1933401), we get a palindrome (2976792).

The spelling of 1043391 in words is "one million, forty-three thousand, three hundred ninety-one".