1231004321 has 8 divisors (see below), whose sum is σ = 1293905664. Its totient is φ = 1168884640.

The previous prime is 1231004309. The next prime is 1231004351. The reversal of 1231004321 is 1234001321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231004321 - 2¹⁰ = 1231003297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231004321.

It is not an unprimeable number, because it can be changed into a prime (1231004351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192185 + ... + 198486.

It is an arithmetic number, because the mean of its divisors is an integer number (161738208).

Almost surely, 2^1231004321 is an apocalyptic number.

It is an amenable number.

1231004321 is a deficient number, since it is larger than the sum of its proper divisors (62901343).

1231004321 is a wasteful number, since it uses less digits than its factorization.

1231004321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390831.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1231004321 is about 35085.6711635961. The cubic root of 1231004321 is about 1071.7328085043.

Adding to 1231004321 its reverse (1234001321), we get a palindrome (2465005642).

The spelling of 1231004321 in words is "one billion, two hundred thirty-one million, four thousand, three hundred twenty-one".