1242120152 has 128 divisors (see below), whose sum is σ = 3088834560. Its totient is φ = 454671360.

The previous prime is 1242120107. The next prime is 1242120161. The reversal of 1242120152 is 2510212421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 517868 + ... + 520260.

It is an arithmetic number, because the mean of its divisors is an integer number (24131520).

Almost surely, 2^1242120152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242120152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544417280).

1242120152 is an abundant number, since it is smaller than the sum of its proper divisors (1846714408).

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

1242120152 is a wasteful number, since it uses less digits than its factorization.

1242120152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1242120152 is about 35243.7250017645. The cubic root of 1242120152 is about 1074.9490228576.

Adding to 1242120152 its reverse (2510212421), we get a palindrome (3752332573).

The spelling of 1242120152 in words is "one billion, two hundred forty-two million, one hundred twenty thousand, one hundred fifty-two".