1321732 has 6 divisors (see below), whose sum is σ = 2313038. Its totient is φ = 660864.

The previous prime is 1321729. The next prime is 1321753. The reversal of 1321732 is 2371231.

It can be written as a sum of positive squares in only one way, i.e., 1308736 + 12996 = 1144^2 + 114^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165213 + ... + 165220.

2^1321732 is an apocalyptic number.

It is an amenable number.

1321732 is a deficient number, since it is larger than the sum of its proper divisors (991306).

1321732 is a wasteful number, since it uses less digits than its factorization.

1321732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330437 (or 330435 counting only the distinct ones).

The product of its digits is 252, while the sum is 19.

The square root of 1321732 is about 1149.6660384651. Note that the first 3 decimals coincide. The cubic root of 1321732 is about 109.7440882863.

Adding to 1321732 its reverse (2371231), we get a palindrome (3692963).

The spelling of 1321732 in words is "one million, three hundred twenty-one thousand, seven hundred thirty-two".