1321642 has 16 divisors (see below), whose sum is σ = 2301120. Its totient is φ = 557568.

The previous prime is 1321637. The next prime is 1321651. The reversal of 1321642 is 2461231.

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234 + ... + 1642.

It is an arithmetic number, because the mean of its divisors is an integer number (143820).

2^1321642 is an apocalyptic number.

1321642 is a deficient number, since it is larger than the sum of its proper divisors (979478).

1321642 is a wasteful number, since it uses less digits than its factorization.

1321642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485.

The product of its digits is 288, while the sum is 19.

The square root of 1321642 is about 1149.6268959971. The cubic root of 1321642 is about 109.7415973144.

Adding to 1321642 its reverse (2461231), we get a palindrome (3782873).

The spelling of 1321642 in words is "one million, three hundred twenty-one thousand, six hundred forty-two".