138575 has 12 divisors (see below), whose sum is σ = 180048. Its totient is φ = 105600.

The previous prime is 138571. The next prime is 138577. The reversal of 138575 is 575831.

It is not a de Polignac number, because 138575 - 2² = 138571 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 455 + ... + 695.

It is an arithmetic number, because the mean of its divisors is an integer number (15004).

2¹³⁸⁵⁷⁵ is an apocalyptic number.

138575 is a deficient number, since it is larger than the sum of its proper divisors (41473).

138575 is a wasteful number, since it uses less digits than its factorization.

138575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 269 counting only the distinct ones).

The product of its digits is 4200, while the sum is 29.

The square root of 138575 is about 372.2566319087. The cubic root of 138575 is about 51.7481659754.

The spelling of 138575 in words is "one hundred thirty-eight thousand, five hundred seventy-five".