1231434372 has 96 divisors (see below), whose sum is σ = 3524919552. Its totient is φ = 326578176.

The previous prime is 1231434341. The next prime is 1231434401. The reversal of 1231434372 is 2734341321.

It is a super-2 number, since 2×1231434372² = 3032861225086068768, which contains 22 as substring.

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

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, 98338 + ... + 110150.

It is an arithmetic number, because the mean of its divisors is an integer number (36717912).

Almost surely, 2^1231434372 is an apocalyptic number.

1231434372 is a gapful number since it is divisible by the number (12) 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 1231434372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762459776).

1231434372 is an abundant number, since it is smaller than the sum of its proper divisors (2293485180).

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

1231434372 is a wasteful number, since it uses less digits than its factorization.

1231434372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11917 (or 11915 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 1231434372 is about 35091.7992129215. The cubic root of 1231434372 is about 1071.8575971550.

Adding to 1231434372 its reverse (2734341321), we get a palindrome (3965775693).

The spelling of 1231434372 in words is "one billion, two hundred thirty-one million, four hundred thirty-four thousand, three hundred seventy-two".