42422145 has 32 divisors (see below), whose sum is σ = 70066944. Its totient is φ = 21907200.

The previous prime is 42422141. The next prime is 42422147. The reversal of 42422145 is 54122424.

It is a happy number.

It is not a de Polignac number, because 42422145 - 2² = 42422141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42422141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64639 + ... + 65291.

It is an arithmetic number, because the mean of its divisors is an integer number (2189592).

Almost surely, 2^42422145 is an apocalyptic number.

It is an amenable number.

42422145 is a deficient number, since it is larger than the sum of its proper divisors (27644799).

42422145 is a wasteful number, since it uses less digits than its factorization.

42422145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793.

The product of its digits is 2560, while the sum is 24.

The square root of 42422145 is about 6513.2284621377. The cubic root of 42422145 is about 348.7633773982.

Adding to 42422145 its reverse (54122424), we get a palindrome (96544569).

The spelling of 42422145 in words is "forty-two million, four hundred twenty-two thousand, one hundred forty-five".