1223290 has 16 divisors (see below), whose sum is σ = 2219400. Its totient is φ = 485440.

The previous prime is 1223281. The next prime is 1223309. The reversal of 1223290 is 923221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 594441 + 628849 = 771^2 + 793^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1080 + ... + 1900.

2^1223290 is an apocalyptic number.

1223290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1223290 is a deficient number, since it is larger than the sum of its proper divisors (996110).

1223290 is a wasteful number, since it uses less digits than its factorization.

1223290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1223290 is about 1106.0244120271. The cubic root of 1223290 is about 106.9489376997.

The spelling of 1223290 in words is "one million, two hundred twenty-three thousand, two hundred ninety".