1231345045 has 16 divisors (see below), whose sum is σ = 1717326720. Its totient is φ = 830038464.

The previous prime is 1231345013. The next prime is 1231345081. The reversal of 1231345045 is 5405431321.

It is a cyclic number.

It is not a de Polignac number, because 1231345045 - 2⁵ = 1231345013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296082 + ... + 300211.

It is an arithmetic number, because the mean of its divisors is an integer number (107332920).

Almost surely, 2^1231345045 is an apocalyptic number.

It is an amenable number.

1231345045 is a deficient number, since it is larger than the sum of its proper divisors (485981675).

1231345045 is an equidigital number, since it uses as much as digits as its factorization.

1231345045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596364.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1231345045 is about 35090.5264280831. The cubic root of 1231345045 is about 1071.8316793741.

Adding to 1231345045 its reverse (5405431321), we get a palindrome (6636776366).

The spelling of 1231345045 in words is "one billion, two hundred thirty-one million, three hundred forty-five thousand, forty-five".