1231273416 has 128 divisors (see below), whose sum is σ = 3549744000. Its totient is φ = 353267712.

The previous prime is 1231273411. The next prime is 1231273423. The reversal of 1231273416 is 6143721321.

It is a happy number.

1231273416 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1231273411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222070 + ... + 227546.

It is an arithmetic number, because the mean of its divisors is an integer number (27732375).

Almost surely, 2^1231273416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231273416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1774872000).

1231273416 is an abundant number, since it is smaller than the sum of its proper divisors (2318470584).

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

1231273416 is a wasteful number, since it uses less digits than its factorization.

1231273416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551 (or 5547 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 1231273416 is about 35089.5057816436. The cubic root of 1231273416 is about 1071.8108956736.

Adding to 1231273416 its reverse (6143721321), we get a palindrome (7374994737).

The spelling of 1231273416 in words is "one billion, two hundred thirty-one million, two hundred seventy-three thousand, four hundred sixteen".