1243456345 has 24 divisors (see below), whose sum is σ = 1595393280. Its totient is φ = 929382720.

The previous prime is 1243456297. The next prime is 1243456367. The reversal of 1243456345 is 5436543421.

It is not a de Polignac number, because 1243456345 - 2⁷ = 1243456217 is a prime.

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, 125586 + ... + 135124.

It is an arithmetic number, because the mean of its divisors is an integer number (66474720).

Almost surely, 2^1243456345 is an apocalyptic number.

It is an amenable number.

1243456345 is a deficient number, since it is larger than the sum of its proper divisors (351936935).

1243456345 is an equidigital number, since it uses as much as digits as its factorization.

1243456345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9633 (or 9604 counting only the distinct ones).

The product of its digits is 172800, while the sum is 37.

The square root of 1243456345 is about 35262.6763731853. The cubic root of 1243456345 is about 1075.3343384071.

Adding to 1243456345 its reverse (5436543421), we get a palindrome (6679999766).

The spelling of 1243456345 in words is "one billion, two hundred forty-three million, four hundred fifty-six thousand, three hundred forty-five".