42545620 has 24 divisors (see below), whose sum is σ = 96219144. Its totient is φ = 15709056.

The previous prime is 42545599. The next prime is 42545621. The reversal of 42545620 is 2654524.

It can be written as a sum of positive squares in 4 ways, for example, as 1943236 + 40602384 = 1394^2 + 6372^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42545621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81559 + ... + 82078.

It is an arithmetic number, because the mean of its divisors is an integer number (4009131).

Almost surely, 2^42545620 is an apocalyptic number.

It is an amenable number.

42545620 is an abundant number, since it is smaller than the sum of its proper divisors (53673524).

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

42545620 is a wasteful number, since it uses less digits than its factorization.

42545620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163659 (or 163657 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 42545620 is about 6522.7003610468. The cubic root of 42545620 is about 349.1014228917.

The spelling of 42545620 in words is "forty-two million, five hundred forty-five thousand, six hundred twenty".