100530621 has 12 divisors (see below), whose sum is σ = 145943200. Its totient is φ = 66682440.

The previous prime is 100530611. The next prime is 100530637. The reversal of 100530621 is 126035001.

100530621 is a `hidden beast` number, since 10 + 0 + 5 + 30 + 621 = 666.

It is not a de Polignac number, because 100530621 - 2⁵ = 100530589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100530594 and 100530603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100530611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26275 + ... + 29856.

Almost surely, 2^100530621 is an apocalyptic number.

It is an amenable number.

100530621 is a deficient number, since it is larger than the sum of its proper divisors (45412579).

100530621 is a wasteful number, since it uses less digits than its factorization.

100530621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56336 (or 56333 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 100530621 is about 10026.4959482364. The cubic root of 100530621 is about 464.9784103747.

Adding to 100530621 its reverse (126035001), we get a palindrome (226565622).

It can be divided in two parts, 1005 and 30621, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 100530621 in words is "one hundred million, five hundred thirty thousand, six hundred twenty-one".