1326634321 has 16 divisors (see below), whose sum is σ = 1480066560. Its totient is φ = 1181710080.

The previous prime is 1326634291. The next prime is 1326634333. The reversal of 1326634321 is 1234366231.

It is a cyclic number.

It is not a de Polignac number, because 1326634321 - 2⁵ = 1326634289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1326634381) 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, 600000 + ... + 602206.

It is an arithmetic number, because the mean of its divisors is an integer number (92504160).

Almost surely, 2^1326634321 is an apocalyptic number.

It is an amenable number.

1326634321 is a deficient number, since it is larger than the sum of its proper divisors (153432239).

1326634321 is a wasteful number, since it uses less digits than its factorization.

1326634321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104.

The product of its digits is 15552, while the sum is 31.

The square root of 1326634321 is about 36422.9916536245. The cubic root of 1326634321 is about 1098.7960162925.

The spelling of 1326634321 in words is "one billion, three hundred twenty-six million, six hundred thirty-four thousand, three hundred twenty-one".