10188621 has 12 divisors (see below), whose sum is σ = 14757340. Its totient is φ = 6773760.

The previous prime is 10188587. The next prime is 10188637. The reversal of 10188621 is 12688101.

It can be written as a sum of positive squares in 2 ways, for example, as 171396 + 10017225 = 414^2 + 3165^2 .

It is not a de Polignac number, because 10188621 - 2¹⁷ = 10057549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10188691) 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, 2445 + ... + 5133.

Almost surely, 2^10188621 is an apocalyptic number.

It is an amenable number.

10188621 is a deficient number, since it is larger than the sum of its proper divisors (4568719).

10188621 is a wasteful number, since it uses less digits than its factorization.

10188621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3116 (or 3113 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 10188621 is about 3191.9619358633. The cubic root of 10188621 is about 216.7896125364.

The spelling of 10188621 in words is "ten million, one hundred eighty-eight thousand, six hundred twenty-one".