1022191 has 2 divisors, whose sum is σ = 1022192. Its totient is φ = 1022190.

The previous prime is 1022183. The next prime is 1022201. The reversal of 1022191 is 1912201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1022191 - 2³ = 1022183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511095 + 511096.

It is an arithmetic number, because the mean of its divisors is an integer number (511096).

2^1022191 is an apocalyptic number.

1022191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022191 is an equidigital number, since it uses as much as digits as its factorization.

1022191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1022191 is about 1011.0346185962. The cubic root of 1022191 is about 100.7342949124.

Adding to 1022191 its reverse (1912201), we get a palindrome (2934392).

It can be divided in two parts, 10 and 22191, that added together give a square (22201 = 149²).

The spelling of 1022191 in words is "one million, twenty-two thousand, one hundred ninety-one".