1305631031242 has 8 divisors (see below), whose sum is σ = 2025979186500. Its totient is φ = 630304635744.

The previous prime is 1305631031231. The next prime is 1305631031261. The reversal of 1305631031242 is 2421301365031.

It can be written as a sum of positive squares in 2 ways, for example, as 1186289110561 + 119341920681 = 1089169^2 + 345459^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11255439867 + ... + 11255439982.

Almost surely, 2^{1305631031242} is an apocalyptic number.

1305631031242 is a deficient number, since it is larger than the sum of its proper divisors (720348155258).

1305631031242 is a wasteful number, since it uses less digits than its factorization.

1305631031242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22510879880.

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 1305631031242 its reverse (2421301365031), we get a palindrome (3726932396273).

The spelling of 1305631031242 in words is "one trillion, three hundred five billion, six hundred thirty-one million, thirty-one thousand, two hundred forty-two".