1022891 has 2 divisors, whose sum is σ = 1022892. Its totient is φ = 1022890.

The previous prime is 1022881. The next prime is 1022899. The reversal of 1022891 is 1982201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1022891 - 2¹⁴ = 1006507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1022899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511445 + 511446.

It is an arithmetic number, because the mean of its divisors is an integer number (511446).

2^1022891 is an apocalyptic number.

1022891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022891 is an equidigital number, since it uses as much as digits as its factorization.

1022891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 1022891 is about 1011.3807393855. The cubic root of 1022891 is about 100.7572840656.

The spelling of 1022891 in words is "one million, twenty-two thousand, eight hundred ninety-one".