100420544 has 28 divisors (see below), whose sum is σ = 227740464. Its totient is φ = 43037184.

The previous prime is 100420519. The next prime is 100420549. The reversal of 100420544 is 445024001.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100420549) 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, 111629 + ... + 112524.

It is an arithmetic number, because the mean of its divisors is an integer number (8133588).

Almost surely, 2^100420544 is an apocalyptic number.

100420544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

100420544 is an abundant number, since it is smaller than the sum of its proper divisors (127319920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100420544 is an equidigital number, since it uses as much as digits as its factorization.

100420544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224172 (or 224162 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 100420544 is about 10021.0051392063. The cubic root of 100420544 is about 464.8086374882.

Adding to 100420544 its reverse (445024001), we get a palindrome (545444545).

The spelling of 100420544 in words is "one hundred million, four hundred twenty thousand, five hundred forty-four".