145540138 has 16 divisors (see below), whose sum is σ = 222444000. Its totient is φ = 71397072.

The previous prime is 145540127. The next prime is 145540139. The reversal of 145540138 is 831045541.

It is not an unprimeable number, because it can be changed into a prime (145540139) 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 7 ways as a sum of consecutive naturals, for example, 86368 + ... + 88036.

It is an arithmetic number, because the mean of its divisors is an integer number (13902750).

Almost surely, 2^145540138 is an apocalyptic number.

145540138 is a deficient number, since it is larger than the sum of its proper divisors (76903862).

145540138 is a wasteful number, since it uses less digits than its factorization.

145540138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 145540138 is about 12064.0017407161. The cubic root of 145540138 is about 526.0103151124.

Adding to 145540138 its reverse (831045541), we get a palindrome (976585679).

The spelling of 145540138 in words is "one hundred forty-five million, five hundred forty thousand, one hundred thirty-eight".