138562 has 8 divisors (see below), whose sum is σ = 215100. Its totient is φ = 66864.

The previous prime is 138559. The next prime is 138563. The reversal of 138562 is 265831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 136161 + 2401 = 369^2 + 49^2 .

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

It is a super-3 number, since 3×138562³ = 7980933362760984, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (138563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137 + ... + 1252.

2¹³⁸⁵⁶² is an apocalyptic number.

138562 is a deficient number, since it is larger than the sum of its proper divisors (76538).

138562 is a wasteful number, since it uses less digits than its factorization.

138562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420.

The product of its digits is 1440, while the sum is 25.

The square root of 138562 is about 372.2391704268. The cubic root of 138562 is about 51.7465477249.

The spelling of 138562 in words is "one hundred thirty-eight thousand, five hundred sixty-two".