1232421320 has 64 divisors (see below), whose sum is σ = 3143448000. Its totient is φ = 431094528.

The previous prime is 1232421317. The next prime is 1232421329. The reversal of 1232421320 is 231242321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1232421292 and 1232421301.

It is not an unprimeable number, because it can be changed into a prime (1232421329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52490 + ... + 72249.

It is an arithmetic number, because the mean of its divisors is an integer number (49116375).

Almost surely, 2^1232421320 is an apocalyptic number.

1232421320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1232421320 is an abundant number, since it is smaller than the sum of its proper divisors (1911026680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1232421320 is a wasteful number, since it uses less digits than its factorization.

1232421320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124782 (or 124778 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1232421320 is about 35105.8587702964. The cubic root of 1232421320 is about 1072.1438717759.

Adding to 1232421320 its reverse (231242321), we get a palindrome (1463663641).

The spelling of 1232421320 in words is "one billion, two hundred thirty-two million, four hundred twenty-one thousand, three hundred twenty".