1242602217 has 12 divisors (see below), whose sum is σ = 1797678324. Its totient is φ = 827105280.

The previous prime is 1242602177. The next prime is 1242602219. The reversal of 1242602217 is 7122062421.

1242602217 is a `hidden beast` number, since 1 + 2 + 42 + 602 + 2 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1179304281 + 63297936 = 34341^2 + 7956^2 .

It is not a de Polignac number, because 1242602217 - 2²² = 1238407913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242602219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101928 + ... + 113465.

It is an arithmetic number, because the mean of its divisors is an integer number (149806527).

Almost surely, 2^1242602217 is an apocalyptic number.

It is an amenable number.

1242602217 is a deficient number, since it is larger than the sum of its proper divisors (555076107).

1242602217 is a wasteful number, since it uses less digits than its factorization.

1242602217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216040 (or 216037 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1242602217 is about 35250.5633572004. The cubic root of 1242602217 is about 1075.0880669153.

Adding to 1242602217 its reverse (7122062421), we get a palindrome (8364664638).

The spelling of 1242602217 in words is "one billion, two hundred forty-two million, six hundred two thousand, two hundred seventeen".