1242155322 has 48 divisors (see below), whose sum is σ = 2740657920. Its totient is φ = 406490400.

The previous prime is 1242155309. The next prime is 1242155323. The reversal of 1242155322 is 2235512421.

1242155322 is a `hidden beast` number, since 124 + 2 + 1 + 5 + 532 + 2 = 666.

It is a super-3 number, since 3×1242155322³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242155323) 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, 1008447 + ... + 1009677.

It is an arithmetic number, because the mean of its divisors is an integer number (57097040).

Almost surely, 2^1242155322 is an apocalyptic number.

1242155322 is an abundant number, since it is smaller than the sum of its proper divisors (1498502598).

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

1242155322 is a wasteful number, since it uses less digits than its factorization.

1242155322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219 (or 2216 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1242155322 is about 35244.2239523017. The cubic root of 1242155322 is about 1074.9591683067.

Adding to 1242155322 its reverse (2235512421), we get a palindrome (3477667743).

The spelling of 1242155322 in words is "one billion, two hundred forty-two million, one hundred fifty-five thousand, three hundred twenty-two".