1243541245 has 8 divisors (see below), whose sum is σ = 1580028984. Its totient is φ = 936313344.

The previous prime is 1243541237. The next prime is 1243541263. The reversal of 1243541245 is 5421453421.

It can be written as a sum of positive squares in 4 ways, for example, as 289102009 + 954439236 = 17003^2 + 30894^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243541245 - 2³ = 1243541237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7314864 + ... + 7315033.

It is an arithmetic number, because the mean of its divisors is an integer number (197503623).

Almost surely, 2^1243541245 is an apocalyptic number.

It is an amenable number.

1243541245 is a deficient number, since it is larger than the sum of its proper divisors (336487739).

1243541245 is a wasteful number, since it uses less digits than its factorization.

1243541245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14629919.

The product of its digits is 19200, while the sum is 31.

The square root of 1243541245 is about 35263.8801750460. The cubic root of 1243541245 is about 1075.3588115374.

Adding to 1243541245 its reverse (5421453421), we get a palindrome (6664994666).

The spelling of 1243541245 in words is "one billion, two hundred forty-three million, five hundred forty-one thousand, two hundred forty-five".