1230421640 has 64 divisors (see below), whose sum is σ = 3171312000. Its totient is φ = 420876288.

The previous prime is 1230421613. The next prime is 1230421669. The reversal of 1230421640 is 461240321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120827 + ... + 130613.

It is an arithmetic number, because the mean of its divisors is an integer number (49551750).

Almost surely, 2^1230421640 is an apocalyptic number.

1230421640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230421640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585656000).

1230421640 is an abundant number, since it is smaller than the sum of its proper divisors (1940890360).

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

1230421640 is a wasteful number, since it uses less digits than its factorization.

1230421640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10254 (or 10250 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1230421640 is about 35077.3664917992. The cubic root of 1230421640 is about 1071.5636845650.

Adding to 1230421640 its reverse (461240321), we get a palindrome (1691661961).

The spelling of 1230421640 in words is "one billion, two hundred thirty million, four hundred twenty-one thousand, six hundred forty".