42120323225 has 6 divisors (see below), whose sum is σ = 52229200830. Its totient is φ = 33696258560.

The previous prime is 42120323213. The next prime is 42120323227. The reversal of 42120323225 is 52232302124.

It can be written as a sum of positive squares in 3 ways, for example, as 5768706304 + 36351616921 = 75952^2 + 190661^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42120323225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42120323194 and 42120323203.

It is not an unprimeable number, because it can be changed into a prime (42120323227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 842406440 + ... + 842406489.

It is an arithmetic number, because the mean of its divisors is an integer number (8704866805).

Almost surely, 2^42120323225 is an apocalyptic number.

It is an amenable number.

42120323225 is a deficient number, since it is larger than the sum of its proper divisors (10108877605).

42120323225 is a wasteful number, since it uses less digits than its factorization.

42120323225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684812939 (or 1684812934 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 42120323225 its reverse (52232302124), we get a palindrome (94352625349).

The spelling of 42120323225 in words is "forty-two billion, one hundred twenty million, three hundred twenty-three thousand, two hundred twenty-five".