1205321042 has 16 divisors (see below), whose sum is σ = 1818960000. Its totient is φ = 599009040.

The previous prime is 1205321017. The next prime is 1205321083. The reversal of 1205321042 is 2401235021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437084 + ... + 439832.

It is an arithmetic number, because the mean of its divisors is an integer number (113685000).

Almost surely, 2^1205321042 is an apocalyptic number.

1205321042 is a deficient number, since it is larger than the sum of its proper divisors (613638958).

1205321042 is a wasteful number, since it uses less digits than its factorization.

1205321042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1205321042 is about 34717.7338258130. The cubic root of 1205321042 is about 1064.2269341125.

Adding to 1205321042 its reverse (2401235021), we get a palindrome (3606556063).

The spelling of 1205321042 in words is "one billion, two hundred five million, three hundred twenty-one thousand, forty-two".