1242120133 has 8 divisors (see below), whose sum is σ = 1274368536. Its totient is φ = 1209964800.

The previous prime is 1242120107. The next prime is 1242120161. The reversal of 1242120133 is 3310212421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 136025569 + 1106094564 = 11663^2 + 33258^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242120133 - 2⁹ = 1242119621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242120133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242120163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4185 + ... + 50017.

It is an arithmetic number, because the mean of its divisors is an integer number (159296067).

Almost surely, 2^1242120133 is an apocalyptic number.

It is an amenable number.

1242120133 is a deficient number, since it is larger than the sum of its proper divisors (32248403).

1242120133 is an equidigital number, since it uses as much as digits as its factorization.

1242120133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46535.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1242120133 is about 35243.7247322130. The cubic root of 1242120133 is about 1074.9490173766.

Adding to 1242120133 its reverse (3310212421), we get a palindrome (4552332554).

The spelling of 1242120133 in words is "one billion, two hundred forty-two million, one hundred twenty thousand, one hundred thirty-three".