1022381 has 2 divisors, whose sum is σ = 1022382. Its totient is φ = 1022380.

The previous prime is 1022377. The next prime is 1022383. The reversal of 1022381 is 1832201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885481 + 136900 = 941^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022381 - 2² = 1022377 is a prime.

It is a super-2 number, since 2×1022381² = 2090525818322, which contains 22 as substring.

Together with 1022383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511190 + 511191.

It is an arithmetic number, because the mean of its divisors is an integer number (511191).

2^1022381 is an apocalyptic number.

It is an amenable number.

1022381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022381 is an equidigital number, since it uses as much as digits as its factorization.

1022381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1022381 is about 1011.1285773827. The cubic root of 1022381 is about 100.7405358629.

Adding to 1022381 its reverse (1832201), we get a palindrome (2854582).

The spelling of 1022381 in words is "one million, twenty-two thousand, three hundred eighty-one".