1243121232 has 40 divisors (see below), whose sum is σ = 3218901120. Its totient is φ = 413405440.

The previous prime is 1243121207. The next prime is 1243121261. The reversal of 1243121232 is 2321213421.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1243121199 and 1243121208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9357 + ... + 50732.

It is an arithmetic number, because the mean of its divisors is an integer number (80472528).

Almost surely, 2^1243121232 is an apocalyptic number.

1243121232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1243121232 is an abundant number, since it is smaller than the sum of its proper divisors (1975779888).

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

1243121232 is a wasteful number, since it uses less digits than its factorization.

1243121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60531 (or 60525 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 1243121232 is about 35257.9243858739. The cubic root of 1243121232 is about 1075.2377284230.

Adding to 1243121232 its reverse (2321213421), we get a palindrome (3564334653).

The spelling of 1243121232 in words is "one billion, two hundred forty-three million, one hundred twenty-one thousand, two hundred thirty-two".