1322661 has 16 divisors (see below), whose sum is σ = 1906560. Its totient is φ = 813120.

The previous prime is 1322641. The next prime is 1322669. The reversal of 1322661 is 1662231.

It is a happy number.

It is not a de Polignac number, because 1322661 - 2⁶ = 1322597 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1671 + ... + 2331.

It is an arithmetic number, because the mean of its divisors is an integer number (119160).

2^1322661 is an apocalyptic number.

It is an amenable number.

1322661 is a deficient number, since it is larger than the sum of its proper divisors (583899).

1322661 is a wasteful number, since it uses less digits than its factorization.

1322661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its digits is 432, while the sum is 21.

The square root of 1322661 is about 1150.0699978697. The cubic root of 1322661 is about 109.7697940474.

Adding to 1322661 its reverse (1662231), we get a palindrome (2984892).

The spelling of 1322661 in words is "one million, three hundred twenty-two thousand, six hundred sixty-one".