42550145 has 16 divisors (see below), whose sum is σ = 56118528. Its totient is φ = 30714240.

The previous prime is 42550141. The next prime is 42550147. The reversal of 42550145 is 54105524.

It is not a de Polignac number, because 42550145 - 2² = 42550141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42550141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4712 + ... + 10358.

It is an arithmetic number, because the mean of its divisors is an integer number (3507408).

Almost surely, 2^42550145 is an apocalyptic number.

It is an amenable number.

42550145 is a deficient number, since it is larger than the sum of its proper divisors (13568383).

42550145 is a wasteful number, since it uses less digits than its factorization.

42550145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5800.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 42550145 is about 6523.0472173670. The cubic root of 42550145 is about 349.1137988459.

Adding to 42550145 its reverse (54105524), we get a palindrome (96655669).

The spelling of 42550145 in words is "forty-two million, five hundred fifty thousand, one hundred forty-five".