1233400321 has 4 divisors (see below), whose sum is σ = 1241256532. Its totient is φ = 1225544112.

The previous prime is 1233400319. The next prime is 1233400349. The reversal of 1233400321 is 1230043321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 181306225 + 1052094096 = 13465^2 + 32436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233400321 - 2¹ = 1233400319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1233400351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3927870 + ... + 3928183.

It is an arithmetic number, because the mean of its divisors is an integer number (310314133).

Almost surely, 2^1233400321 is an apocalyptic number.

It is an amenable number.

1233400321 is a deficient number, since it is larger than the sum of its proper divisors (7856211).

1233400321 is an equidigital number, since it uses as much as digits as its factorization.

1233400321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7856210.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1233400321 is about 35119.7995580840. The cubic root of 1233400321 is about 1072.4276903305.

Adding to 1233400321 its reverse (1230043321), we get a palindrome (2463443642).

The spelling of 1233400321 in words is "one billion, two hundred thirty-three million, four hundred thousand, three hundred twenty-one".