145440042 has 16 divisors (see below), whose sum is σ = 317323872. Its totient is φ = 44072720.

The previous prime is 145440023. The next prime is 145440047. The reversal of 145440042 is 240044541.

It is a happy number.

145440042 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 = 145439994 and 145440021.

It is not an unprimeable number, because it can be changed into a prime (145440047) 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, 1101753 + ... + 1101884.

It is an arithmetic number, because the mean of its divisors is an integer number (19832742).

Almost surely, 2^145440042 is an apocalyptic number.

145440042 is an abundant number, since it is smaller than the sum of its proper divisors (171883830).

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

145440042 is a wasteful number, since it uses less digits than its factorization.

145440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203653.

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

The square root of 145440042 is about 12059.8524866600. The cubic root of 145440042 is about 525.8896986641.

Adding to 145440042 its reverse (240044541), we get a palindrome (385484583).

The spelling of 145440042 in words is "one hundred forty-five million, four hundred forty thousand, forty-two".