1242161204 has 6 divisors (see below), whose sum is σ = 2173782114. Its totient is φ = 621080600.

The previous prime is 1242161191. The next prime is 1242161281. The reversal of 1242161204 is 4021612421.

It can be written as a sum of positive squares in only one way, i.e., 1209648400 + 32512804 = 34780^2 + 5702^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1242161204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155270147 + ... + 155270154.

It is an arithmetic number, because the mean of its divisors is an integer number (362297019).

Almost surely, 2^1242161204 is an apocalyptic number.

It is an amenable number.

1242161204 is a deficient number, since it is larger than the sum of its proper divisors (931620910).

1242161204 is a wasteful number, since it uses less digits than its factorization.

1242161204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310540305 (or 310540303 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1242161204 is about 35244.3073985005. The cubic root of 1242161204 is about 1074.9608650617.

Adding to 1242161204 its reverse (4021612421), we get a palindrome (5263773625).

The spelling of 1242161204 in words is "one billion, two hundred forty-two million, one hundred sixty-one thousand, two hundred four".