1022591 has 2 divisors, whose sum is σ = 1022592. Its totient is φ = 1022590.

The previous prime is 1022573. The next prime is 1022611. The reversal of 1022591 is 1952201.

It is an a-pointer prime, because the next prime (1022611) can be obtained adding 1022591 to its sum of digits (20).

It is a weak prime.

It is an emirp because it is prime and its reverse (1952201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1022591 - 2¹⁸ = 760447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511295 + 511296.

It is an arithmetic number, because the mean of its divisors is an integer number (511296).

2^1022591 is an apocalyptic number.

1022591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022591 is an equidigital number, since it uses as much as digits as its factorization.

1022591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1022591 is about 1011.2324164108. The cubic root of 1022591 is about 100.7474328560.

Adding to 1022591 its reverse (1952201), we get a palindrome (2974792).

The spelling of 1022591 in words is "one million, twenty-two thousand, five hundred ninety-one".