1242155214 has 48 divisors (see below), whose sum is σ = 2714056800. Its totient is φ = 410572800.

The previous prime is 1242155207. The next prime is 1242155219. The reversal of 1242155214 is 4125512421.

It is a happy number.

1242155214 is a `hidden beast` number, since 124 + 2 + 15 + 521 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242155219) 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 23 ways as a sum of consecutive naturals, for example, 2066514 + ... + 2067114.

It is an arithmetic number, because the mean of its divisors is an integer number (56542850).

Almost surely, 2^1242155214 is an apocalyptic number.

1242155214 is an abundant number, since it is smaller than the sum of its proper divisors (1471901586).

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

1242155214 is a wasteful number, since it uses less digits than its factorization.

1242155214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385 (or 1382 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1242155214 is about 35244.2224201358. Note that the first 3 decimals coincide. The cubic root of 1242155214 is about 1074.9591371523.

Adding to 1242155214 its reverse (4125512421), we get a palindrome (5367667635).

The spelling of 1242155214 in words is "one billion, two hundred forty-two million, one hundred fifty-five thousand, two hundred fourteen".