1243315245 has 16 divisors (see below), whose sum is σ = 2000299392. Its totient is φ = 659436480.

The previous prime is 1243315219. The next prime is 1243315259. The reversal of 1243315245 is 5425133421.

1243315245 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1243315245 - 2¹⁰ = 1243314221 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, 226257 + ... + 231686.

It is an arithmetic number, because the mean of its divisors is an integer number (125018712).

Almost surely, 2^1243315245 is an apocalyptic number.

1243315245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1243315245 is a deficient number, since it is larger than the sum of its proper divisors (756984147).

1243315245 is a wasteful number, since it uses less digits than its factorization.

1243315245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458132.

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

The square root of 1243315245 is about 35260.6756174637. The cubic root of 1243315245 is about 1075.2936626956.

Adding to 1243315245 its reverse (5425133421), we get a palindrome (6668448666).

The spelling of 1243315245 in words is "one billion, two hundred forty-three million, three hundred fifteen thousand, two hundred forty-five".