100538 has 8 divisors (see below), whose sum is σ = 159732. Its totient is φ = 47296.

The previous prime is 100537. The next prime is 100547. The reversal of 100538 is 835001.

It can be written as a sum of positive squares in 2 ways, for example, as 100489 + 49 = 317^2 + 7^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100537) 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, 1445 + ... + 1512.

2¹⁰⁰⁵³⁸ is an apocalyptic number.

100538 is a deficient number, since it is larger than the sum of its proper divisors (59194).

100538 is a wasteful number, since it uses less digits than its factorization.

100538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 100538 is about 317.0772776469. The cubic root of 100538 is about 46.4989786649.

Adding to 100538 its reverse (835001), we get a palindrome (935539).

The spelling of 100538 in words is "one hundred thousand, five hundred thirty-eight".