1322780 has 36 divisors (see below), whose sum is σ = 2974440. Its totient is φ = 492768.

The previous prime is 1322767. The next prime is 1322813. The reversal of 1322780 is 872231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22391 + ... + 22449.

2^1322780 is an apocalyptic number.

1322780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1322780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487220).

1322780 is an abundant number, since it is smaller than the sum of its proper divisors (1651660).

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

1322780 is a wasteful number, since it uses less digits than its factorization.

1322780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1322780 is about 1150.1217326875. The cubic root of 1322780 is about 109.7730859501.

The spelling of 1322780 in words is "one million, three hundred twenty-two thousand, seven hundred eighty".