100506621 has 8 divisors (see below), whose sum is σ = 137277504. Its totient is φ = 65370080.

The previous prime is 100506617. The next prime is 100506629. The reversal of 100506621 is 126605001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100506621 - 2² = 100506617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100506629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408441 + ... + 408686.

It is an arithmetic number, because the mean of its divisors is an integer number (17159688).

Almost surely, 2^100506621 is an apocalyptic number.

It is an amenable number.

100506621 is a deficient number, since it is larger than the sum of its proper divisors (36770883).

100506621 is an equidigital number, since it uses as much as digits as its factorization.

100506621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817171.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 100506621 is about 10025.2990479087. The cubic root of 100506621 is about 464.9414054969.

The spelling of 100506621 in words is "one hundred million, five hundred six thousand, six hundred twenty-one".