1321153430 has 32 divisors (see below), whose sum is σ = 2398447584. Its totient is φ = 523950336.

The previous prime is 1321153423. The next prime is 1321153451. The reversal of 1321153430 is 343511231.

It is a junction number, because it is equal to n+sod(n) for n = 1321153396 and 1321153405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1385834 + ... + 1386786.

It is an arithmetic number, because the mean of its divisors is an integer number (74951487).

Almost surely, 2^1321153430 is an apocalyptic number.

1321153430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321153430 is a deficient number, since it is larger than the sum of its proper divisors (1077294154).

1321153430 is a wasteful number, since it uses less digits than its factorization.

1321153430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1321153430 is about 36347.6743410084. The cubic root of 1321153430 is about 1097.2807296098.

Adding to 1321153430 its reverse (343511231), we get a palindrome (1664664661).

The spelling of 1321153430 in words is "one billion, three hundred twenty-one million, one hundred fifty-three thousand, four hundred thirty".