1231145334 has 48 divisors (see below), whose sum is σ = 2787943392. Its totient is φ = 391906944.

The previous prime is 1231145327. The next prime is 1231145351. The reversal of 1231145334 is 4335411321.

It is a happy number.

1231145334 is a `hidden beast` number, since 12 + 3 + 114 + 533 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1231145298 and 1231145307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301434 + ... + 305490.

It is an arithmetic number, because the mean of its divisors is an integer number (58082154).

Almost surely, 2^1231145334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231145334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393971696).

1231145334 is an abundant number, since it is smaller than the sum of its proper divisors (1556798058).

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

1231145334 is a wasteful number, since it uses less digits than its factorization.

1231145334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4821 (or 4818 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1231145334 is about 35087.6806586015. The cubic root of 1231145334 is about 1071.7737296952.

Adding to 1231145334 its reverse (4335411321), we get a palindrome (5566556655).

The spelling of 1231145334 in words is "one billion, two hundred thirty-one million, one hundred forty-five thousand, three hundred thirty-four".