242120154445 has 16 divisors (see below), whose sum is σ = 314702386992. Its totient is φ = 177762908160.

The previous prime is 242120154413. The next prime is 242120154457. The reversal of 242120154445 is 544451021242.

It can be written as a sum of positive squares in 8 ways, for example, as 1347403849 + 240772750596 = 36707^2 + 490686^2 .

It is not a de Polignac number, because 242120154445 - 2⁵ = 242120154413 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 242120154445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10754436 + ... + 10776925.

It is an arithmetic number, because the mean of its divisors is an integer number (19668899187).

Almost surely, 2^242120154445 is an apocalyptic number.

It is an amenable number.

242120154445 is a deficient number, since it is larger than the sum of its proper divisors (72582232547).

242120154445 is a wasteful number, since it uses less digits than its factorization.

242120154445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21531552.

The product of its (nonzero) digits is 51200, while the sum is 34.

Adding to 242120154445 its reverse (544451021242), we get a palindrome (786571175687).

The spelling of 242120154445 in words is "two hundred forty-two billion, one hundred twenty million, one hundred fifty-four thousand, four hundred forty-five".