1242215204 has 12 divisors (see below), whose sum is σ = 2174377884. Its totient is φ = 620964384.

The previous prime is 1242215201. The next prime is 1242215207. The reversal of 1242215204 is 4025122421.

It is an interprime number because it is at equal distance from previous prime (1242215201) and next prime (1242215207).

It can be written as a sum of positive squares in 2 ways, for example, as 294191104 + 948024100 = 17152^2 + 30790^2 .

It is a super-2 number, since 2×1242215204² = 3086197226097523232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1242215204.

It is not an unprimeable number, because it can be changed into a prime (1242215201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14939 + ... + 52034.

It is an arithmetic number, because the mean of its divisors is an integer number (181198157).

Almost surely, 2^1242215204 is an apocalyptic number.

It is an amenable number.

1242215204 is a deficient number, since it is larger than the sum of its proper divisors (932162680).

1242215204 is a wasteful number, since it uses less digits than its factorization.

1242215204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71614 (or 71612 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1242215204 is about 35245.0734713378. The cubic root of 1242215204 is about 1074.9764419572.

Adding to 1242215204 its reverse (4025122421), we get a palindrome (5267337625).

The spelling of 1242215204 in words is "one billion, two hundred forty-two million, two hundred fifteen thousand, two hundred four".