42550365 has 64 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 18735360.

The previous prime is 42550363. The next prime is 42550393. The reversal of 42550365 is 56305524.

It is not a de Polignac number, because 42550365 - 2¹ = 42550363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42550363) 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 63 ways as a sum of consecutive naturals, for example, 177916 + ... + 178154.

It is an arithmetic number, because the mean of its divisors is an integer number (1270080).

Almost surely, 2^42550365 is an apocalyptic number.

It is an amenable number.

42550365 is a deficient number, since it is larger than the sum of its proper divisors (38734755).

42550365 is a wasteful number, since it uses less digits than its factorization.

42550365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 42550365 is about 6523.0640806296. The cubic root of 42550365 is about 349.1144005274.

Adding to 42550365 its reverse (56305524), we get a palindrome (98855889).

The spelling of 42550365 in words is "forty-two million, five hundred fifty thousand, three hundred sixty-five".