100455 has 16 divisors (see below), whose sum is σ = 165984. Its totient is φ = 51840.

The previous prime is 100447. The next prime is 100459. The reversal of 100455 is 554001.

100455 = 33² + 34² + ... + 69².

It is not a de Polignac number, because 100455 - 2³ = 100447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

100455 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465 + ... + 645.

It is an arithmetic number, because the mean of its divisors is an integer number (10374).

2¹⁰⁰⁴⁵⁵ is an apocalyptic number.

100455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100455 is a deficient number, since it is larger than the sum of its proper divisors (65529).

100455 is a wasteful number, since it uses less digits than its factorization.

100455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 100455 is about 316.9463677028. The cubic root of 100455 is about 46.4861792664.

Adding to 100455 its reverse (554001), we get a palindrome (654456).

It can be divided in two parts, 100 and 455, that added together give a palindrome (555).

The spelling of 100455 in words is "one hundred thousand, four hundred fifty-five".