1243342320 has 160 divisors (see below), whose sum is σ = 4247299584. Its totient is φ = 298368000.

The previous prime is 1243342301. The next prime is 1243342337. The reversal of 1243342320 is 232433421.

1243342320 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264309 + ... + 268971.

Almost surely, 2^1243342320 is an apocalyptic number.

1243342320 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 1243342320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2123649792).

1243342320 is an abundant number, since it is smaller than the sum of its proper divisors (3003957264).

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

1243342320 is a wasteful number, since it uses less digits than its factorization.

1243342320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791 (or 4785 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 1243342320 is about 35261.0595416530. The cubic root of 1243342320 is about 1075.3014680007.

Adding to 1243342320 its reverse (232433421), we get a palindrome (1475775741).

The spelling of 1243342320 in words is "one billion, two hundred forty-three million, three hundred forty-two thousand, three hundred twenty".