145220042 has 16 divisors (see below), whose sum is σ = 244056672. Its totient is φ = 64224720.

The previous prime is 145220041. The next prime is 145220057. The reversal of 145220042 is 240022541.

It is a happy number.

145220042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 145219996 and 145220023.

It is not an unprimeable number, because it can be changed into a prime (145220041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88388 + ... + 90015.

It is an arithmetic number, because the mean of its divisors is an integer number (15253542).

Almost surely, 2^145220042 is an apocalyptic number.

145220042 is a deficient number, since it is larger than the sum of its proper divisors (98836630).

145220042 is a wasteful number, since it uses less digits than its factorization.

145220042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178453.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 145220042 is about 12050.7278618347. The cubic root of 145220042 is about 525.6244023561.

Adding to 145220042 its reverse (240022541), we get a palindrome (385242583).

The spelling of 145220042 in words is "one hundred forty-five million, two hundred twenty thousand, forty-two".