1022290 has 8 divisors (see below), whose sum is σ = 1840140. Its totient is φ = 408912.

The previous prime is 1022251. The next prime is 1022291. The reversal of 1022290 is 922201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1022121 + 169 = 1011^2 + 13^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1022291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51105 + ... + 51124.

2^1022290 is an apocalyptic number.

1022290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1022290 is a deficient number, since it is larger than the sum of its proper divisors (817850).

1022290 is a wasteful number, since it uses less digits than its factorization.

1022290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102236.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1022290 is about 1011.0835771587. The cubic root of 1022290 is about 100.7375468725.

Adding to 1022290 its reverse (922201), we get a palindrome (1944491).

The spelling of 1022290 in words is "one million, twenty-two thousand, two hundred ninety".