100404645 has 32 divisors (see below), whose sum is σ = 184481280. Its totient is φ = 46117440.

The previous prime is 100404611. The next prime is 100404649. The reversal of 100404645 is 546404001.

It is not a de Polignac number, because 100404645 - 2⁷ = 100404517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100404649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12879 + ... + 19148.

It is an arithmetic number, because the mean of its divisors is an integer number (5765040).

Almost surely, 2^100404645 is an apocalyptic number.

100404645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100404645 is a deficient number, since it is larger than the sum of its proper divisors (84076635).

100404645 is a wasteful number, since it uses less digits than its factorization.

100404645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32065.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 100404645 is about 10020.2118241083. The cubic root of 100404645 is about 464.7841060451.

Adding to 100404645 its reverse (546404001), we get a palindrome (646808646).

The spelling of 100404645 in words is "one hundred million, four hundred four thousand, six hundred forty-five".