138045 has 8 divisors (see below), whose sum is σ = 220896. Its totient is φ = 73616.

The previous prime is 138041. The next prime is 138053. The reversal of 138045 is 540831.

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

It is a cyclic number.

It is not a de Polignac number, because 138045 - 2² = 138041 is a prime.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138041) 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, 4587 + ... + 4616.

It is an arithmetic number, because the mean of its divisors is an integer number (27612).

2¹³⁸⁰⁴⁵ is an apocalyptic number.

138045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138045 is a deficient number, since it is larger than the sum of its proper divisors (82851).

138045 is an equidigital number, since it uses as much as digits as its factorization.

138045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9211.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 138045 is about 371.5440754473. The cubic root of 138045 is about 51.6821089233.

Adding to 138045 its reverse (540831), we get a palindrome (678876).

The spelling of 138045 in words is "one hundred thirty-eight thousand, forty-five".