145538 has 8 divisors (see below), whose sum is σ = 222588. Its totient is φ = 71344.

The previous prime is 145531. The next prime is 145543. The reversal of 145538 is 835541.

It can be written as a sum of positive squares in 2 ways, for example, as 117649 + 27889 = 343^2 + 167^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581 + ... + 792.

2¹⁴⁵⁵³⁸ is an apocalyptic number.

145538 is a deficient number, since it is larger than the sum of its proper divisors (77050).

145538 is a wasteful number, since it uses less digits than its factorization.

145538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428.

The product of its digits is 2400, while the sum is 26.

The square root of 145538 is about 381.4944298414. The cubic root of 145538 is about 52.6007739384.

The spelling of 145538 in words is "one hundred forty-five thousand, five hundred thirty-eight".