1242165200 has 30 divisors (see below), whose sum is σ = 2984302854. Its totient is φ = 496865920.

The previous prime is 1242165181. The next prime is 1242165203. The reversal of 1242165200 is 25612421.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 21641104 + 1220524096 = 4652^2 + 34936^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242165203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1552307 + ... + 1553106.

Almost surely, 2^1242165200 is an apocalyptic number.

1242165200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242165200 is an abundant number, since it is smaller than the sum of its proper divisors (1742137654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242165200 is a wasteful number, since it uses less digits than its factorization.

1242165200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105431 (or 3105420 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1242165200 is about 35244.3640884610. The cubic root of 1242165200 is about 1074.9620177674.

Adding to 1242165200 its reverse (25612421), we get a palindrome (1267777621).

The spelling of 1242165200 in words is "one billion, two hundred forty-two million, one hundred sixty-five thousand, two hundred".