1231233445 has 24 divisors (see below), whose sum is σ = 1604138472. Its totient is φ = 906796800.

The previous prime is 1231233439. The next prime is 1231233457. The reversal of 1231233445 is 5443321321.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 1184529889 + 46703556 = 34417^2 + 6834^2 .

It is not a de Polignac number, because 1231233445 - 2⁵ = 1231233413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354015 + ... + 357475.

It is an arithmetic number, because the mean of its divisors is an integer number (66839103).

Almost surely, 2^1231233445 is an apocalyptic number.

It is an amenable number.

1231233445 is a deficient number, since it is larger than the sum of its proper divisors (372905027).

1231233445 is a wasteful number, since it uses less digits than its factorization.

1231233445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913 (or 3900 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 1231233445 is about 35088.9362192700. The cubic root of 1231233445 is about 1071.7992974327.

Adding to 1231233445 its reverse (5443321321), we get a palindrome (6674554766).

The spelling of 1231233445 in words is "one billion, two hundred thirty-one million, two hundred thirty-three thousand, four hundred forty-five".