1321634 has 4 divisors (see below), whose sum is σ = 1982454. Its totient is φ = 660816.

The previous prime is 1321633. The next prime is 1321637. The reversal of 1321634 is 4361231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 10609 = 1145^2 + 103^2 .

It is not an unprimeable number, because it can be changed into a prime (1321633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330407 + ... + 330410.

2^1321634 is an apocalyptic number.

1321634 is a deficient number, since it is larger than the sum of its proper divisors (660820).

1321634 is an equidigital number, since it uses as much as digits as its factorization.

1321634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660819.

The product of its digits is 432, while the sum is 20.

The square root of 1321634 is about 1149.6234166021. The cubic root of 1321634 is about 109.7413758892.

Adding to 1321634 its reverse (4361231), we get a palindrome (5682865).

The spelling of 1321634 in words is "one million, three hundred twenty-one thousand, six hundred thirty-four".