1242203205 has 32 divisors (see below), whose sum is σ = 2077747200. Its totient is φ = 632540480.

The previous prime is 1242203203. The next prime is 1242203219. The reversal of 1242203205 is 5023022421.

It is not a de Polignac number, because 1242203205 - 2¹ = 1242203203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242203203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203650 + ... + 209660.

It is an arithmetic number, because the mean of its divisors is an integer number (64929600).

Almost surely, 2^1242203205 is an apocalyptic number.

1242203205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242203205 is a deficient number, since it is larger than the sum of its proper divisors (835543995).

1242203205 is a wasteful number, since it uses less digits than its factorization.

1242203205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6641.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1242203205 is about 35244.9032485550. The cubic root of 1242203205 is about 1074.9729807523.

Adding to 1242203205 its reverse (5023022421), we get a palindrome (6265225626).

The spelling of 1242203205 in words is "one billion, two hundred forty-two million, two hundred three thousand, two hundred five".