1321662 has 16 divisors (see below), whose sum is σ = 2660112. Its totient is φ = 437760.

The previous prime is 1321657. The next prime is 1321669. The reversal of 1321662 is 2661231.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321669) 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 7 ways as a sum of consecutive naturals, for example, 478 + ... + 1694.

It is an arithmetic number, because the mean of its divisors is an integer number (166257).

2^1321662 is an apocalyptic number.

1321662 is an abundant number, since it is smaller than the sum of its proper divisors (1338450).

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

1321662 is a wasteful number, since it uses less digits than its factorization.

1321662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403.

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

The square root of 1321662 is about 1149.6355944385. The cubic root of 1321662 is about 109.7421508735.

Adding to 1321662 its reverse (2661231), we get a palindrome (3982893).

The spelling of 1321662 in words is "one million, three hundred twenty-one thousand, six hundred sixty-two".