145138 has 12 divisors (see below), whose sum is σ = 253422. Its totient is φ = 62160.

The previous prime is 145133. The next prime is 145139. The reversal of 145138 is 831541.

It can be written as a sum of positive squares in only one way, i.e., 127449 + 17689 = 357^2 + 133^2 .

It is not an unprimeable number, because it can be changed into a prime (145133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 643 + ... + 838.

2¹⁴⁵¹³⁸ is an apocalyptic number.

145138 is a deficient number, since it is larger than the sum of its proper divisors (108284).

145138 is a wasteful number, since it uses less digits than its factorization.

145138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497 (or 1490 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 145138 is about 380.9698150773. The cubic root of 145138 is about 52.5525399950.

Adding to 145138 its reverse (831541), we get a palindrome (976679).

The spelling of 145138 in words is "one hundred forty-five thousand, one hundred thirty-eight".