1322730 has 80 divisors (see below), whose sum is σ = 3763584. Its totient is φ = 332640.

The previous prime is 1322693. The next prime is 1322731. The reversal of 1322730 is 372231.

It is a super-2 number, since 2×1322730² = 3499229305800, which contains 22 as substring.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1322731) 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 39 ways as a sum of consecutive naturals, for example, 18595 + ... + 18665.

2^1322730 is an apocalyptic number.

1322730 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 1322730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881792).

1322730 is an abundant number, since it is smaller than the sum of its proper divisors (2440854).

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

1322730 is a wasteful number, since it uses less digits than its factorization.

1322730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 1322730 is about 1150.0999956526. The cubic root of 1322730 is about 109.7717028218.

Adding to 1322730 its reverse (372231), we get a palindrome (1694961).

The spelling of 1322730 in words is "one million, three hundred twenty-two thousand, seven hundred thirty".