1045391 has 2 divisors, whose sum is σ = 1045392. Its totient is φ = 1045390.

The previous prime is 1045367. The next prime is 1045393. The reversal of 1045391 is 1935401.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1045391 - 2¹⁰ = 1044367 is a prime.

Together with 1045393, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1045393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522695 + 522696.

It is an arithmetic number, because the mean of its divisors is an integer number (522696).

2^1045391 is an apocalyptic number.

1045391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1045391 is an equidigital number, since it uses as much as digits as its factorization.

1045391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1045391 is about 1022.4436414786. The cubic root of 1045391 is about 101.4907010174.

The spelling of 1045391 in words is "one million, forty-five thousand, three hundred ninety-one".