1245112243 has 4 divisors (see below), whose sum is σ = 1246066200. Its totient is φ = 1244158288.

The previous prime is 1245112201. The next prime is 1245112259. The reversal of 1245112243 is 3422115421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3422115421 = 23 ⋅148787627.

It is a cyclic number.

It is not a de Polignac number, because 1245112243 - 2²⁵ = 1211557811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245115243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475018 + ... + 477631.

It is an arithmetic number, because the mean of its divisors is an integer number (311516550).

Almost surely, 2^1245112243 is an apocalyptic number.

1245112243 is a deficient number, since it is larger than the sum of its proper divisors (953957).

1245112243 is an equidigital number, since it uses as much as digits as its factorization.

1245112243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953956.

The product of its digits is 1920, while the sum is 25.

The square root of 1245112243 is about 35286.1480329038. The cubic root of 1245112243 is about 1075.8114638942.

Adding to 1245112243 its reverse (3422115421), we get a palindrome (4667227664).

The spelling of 1245112243 in words is "one billion, two hundred forty-five million, one hundred twelve thousand, two hundred forty-three".