1322656 has 12 divisors (see below), whose sum is σ = 2604042. Its totient is φ = 661312.

The previous prime is 1322641. The next prime is 1322669. The reversal of 1322656 is 6562231.

It can be written as a sum of positive squares in only one way, i.e., 810000 + 512656 = 900^2 + 716^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1322656.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20635 + ... + 20698.

2^1322656 is an apocalyptic number.

1322656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1322656 is a deficient number, since it is larger than the sum of its proper divisors (1281386).

1322656 is an equidigital number, since it uses as much as digits as its factorization.

1322656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41343 (or 41335 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 1322656 is about 1150.0678240869. The cubic root of 1322656 is about 109.7696557279.

Adding to 1322656 its reverse (6562231), we get a palindrome (7884887).

It can be divided in two parts, 13 and 22656, that multiplied together give a triangular number (294528 = T₇₆₇).

The spelling of 1322656 in words is "one million, three hundred twenty-two thousand, six hundred fifty-six".