42145365321 has 12 divisors (see below), whose sum is σ = 60975312372. Its totient is φ = 28051368576.

The previous prime is 42145365307. The next prime is 42145365331. The reversal of 42145365321 is 12356354124.

42145365321 is a `hidden beast` number, since 42 + 14 + 536 + 53 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1792590921 + 40352774400 = 42339^2 + 200880^2 .

It is not a de Polignac number, because 42145365321 - 2²⁷ = 42011147593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42145365331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3789276 + ... + 3800381.

It is an arithmetic number, because the mean of its divisors is an integer number (5081276031).

Almost surely, 2^42145365321 is an apocalyptic number.

It is an amenable number.

42145365321 is a deficient number, since it is larger than the sum of its proper divisors (18829947051).

42145365321 is a wasteful number, since it uses less digits than its factorization.

42145365321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7590280 (or 7590277 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 42145365321 in words is "forty-two billion, one hundred forty-five million, three hundred sixty-five thousand, three hundred twenty-one".