1323090 has 48 divisors (see below), whose sum is σ = 3510936. Its totient is φ = 345600.

The previous prime is 1323079. The next prime is 1323107. The reversal of 1323090 is 903231.

It can be written as a sum of positive squares in 4 ways, for example, as 859329 + 463761 = 927^2 + 681^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5370 + ... + 5610.

2^1323090 is an apocalyptic number.

1323090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755468).

1323090 is an abundant number, since it is smaller than the sum of its proper divisors (2187846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1323090 is a wasteful number, since it uses less digits than its factorization.

1323090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1323090 is about 1150.2564931353. The cubic root of 1323090 is about 109.7816605679.

The spelling of 1323090 in words is "one million, three hundred twenty-three thousand, ninety".