1243213432 has 16 divisors (see below), whose sum is σ = 2335073760. Its totient is φ = 620527104.

The previous prime is 1243213423. The next prime is 1243213507. The reversal of 1243213432 is 2343123421.

It is a junction number, because it is equal to n+sod(n) for n = 1243213397 and 1243213406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130048 + ... + 139279.

It is an arithmetic number, because the mean of its divisors is an integer number (145942110).

Almost surely, 2^1243213432 is an apocalyptic number.

It is an amenable number.

1243213432 is a deficient number, since it is larger than the sum of its proper divisors (1091860328).

1243213432 is a wasteful number, since it uses less digits than its factorization.

1243213432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269910 (or 269906 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 1243213432 is about 35259.2318691148. The cubic root of 1243213432 is about 1075.2643105629.

Adding to 1243213432 its reverse (2343123421), we get a palindrome (3586336853).

The spelling of 1243213432 in words is "one billion, two hundred forty-three million, two hundred thirteen thousand, four hundred thirty-two".