1321724234 has 8 divisors (see below), whose sum is σ = 1982875908. Its totient is φ = 660765600.

The previous prime is 1321724219. The next prime is 1321724263. The reversal of 1321724234 is 4324271231.

It can be written as a sum of positive squares in 2 ways, for example, as 1292618209 + 29106025 = 35953^2 + 5395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1321724197 and 1321724206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29717 + ... + 59384.

Almost surely, 2^1321724234 is an apocalyptic number.

1321724234 is a deficient number, since it is larger than the sum of its proper divisors (661151674).

1321724234 is an equidigital number, since it uses as much as digits as its factorization.

1321724234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96520.

The product of its digits is 8064, while the sum is 29.

The square root of 1321724234 is about 36355.5254947580. The cubic root of 1321724234 is about 1097.4387334759.

Adding to 1321724234 its reverse (4324271231), we get a palindrome (5645995465).

The spelling of 1321724234 in words is "one billion, three hundred twenty-one million, seven hundred twenty-four thousand, two hundred thirty-four".