1205542530247 has 24 divisors (see below), whose sum is σ = 1344061658016. Its totient is φ = 1080272424000.

The previous prime is 1205542530223. The next prime is 1205542530287. The reversal of 1205542530247 is 7420352455021.

It is not a de Polignac number, because 1205542530247 - 2⁷ = 1205542530119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205542530287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47040097 + ... + 47065717.

It is an arithmetic number, because the mean of its divisors is an integer number (56002569084).

Almost surely, 2^{1205542530247} is an apocalyptic number.

1205542530247 is a deficient number, since it is larger than the sum of its proper divisors (138519127769).

1205542530247 is a wasteful number, since it uses less digits than its factorization.

1205542530247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31191 (or 31180 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 40.

Adding to 1205542530247 its reverse (7420352455021), we get a palindrome (8625894985268).

The spelling of 1205542530247 in words is "one trillion, two hundred five billion, five hundred forty-two million, five hundred thirty thousand, two hundred forty-seven".