1243152345 has 32 divisors (see below), whose sum is σ = 2008790784. Its totient is φ = 656467200.

The previous prime is 1243152343. The next prime is 1243152373. The reversal of 1243152345 is 5432513421.

It is not a de Polignac number, because 1243152345 - 2¹ = 1243152343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243152343) 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, 713175 + ... + 714915.

It is an arithmetic number, because the mean of its divisors is an integer number (62774712).

Almost surely, 2^1243152345 is an apocalyptic number.

1243152345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1243152345 is a deficient number, since it is larger than the sum of its proper divisors (765638439).

1243152345 is a wasteful number, since it uses less digits than its factorization.

1243152345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193.

The product of its digits is 14400, while the sum is 30.

The square root of 1243152345 is about 35258.3656030735. The cubic root of 1243152345 is about 1075.2466987447.

Adding to 1243152345 its reverse (5432513421), we get a palindrome (6675665766).

The spelling of 1243152345 in words is "one billion, two hundred forty-three million, one hundred fifty-two thousand, three hundred forty-five".