100404025 has 6 divisors (see below), whose sum is σ = 124501022. Its totient is φ = 80323200.

The previous prime is 100404019. The next prime is 100404049. The reversal of 100404025 is 520404001.

It can be written as a sum of positive squares in 3 ways, for example, as 3519376 + 96884649 = 1876^2 + 9843^2 .

It is a de Polignac number, because none of the positive numbers 2^k-100404025 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2008056 + ... + 2008105.

Almost surely, 2^100404025 is an apocalyptic number.

It is an amenable number.

100404025 is a deficient number, since it is larger than the sum of its proper divisors (24096997).

100404025 is an equidigital number, since it uses as much as digits as its factorization.

100404025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4016171 (or 4016166 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 100404025 is about 10020.1808865908. The cubic root of 100404025 is about 464.7831493605.

Adding to 100404025 its reverse (520404001), we get a palindrome (620808026).

The spelling of 100404025 in words is "one hundred million, four hundred four thousand, twenty-five".