920621 has 8 divisors (see below), whose sum is σ = 1034880. Its totient is φ = 812592.

The previous prime is 920609. The next prime is 920641. The reversal of 920621 is 126029.

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 920621 - 2¹⁸ = 658477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 920593 and 920602.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 920621.

It is not an unprimeable number, because it can be changed into a prime (920641) 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, 1241 + ... + 1838.

It is an arithmetic number, because the mean of its divisors is an integer number (129360).

2⁹²⁰⁶²¹ is an apocalyptic number.

It is an amenable number.

920621 is a deficient number, since it is larger than the sum of its proper divisors (114259).

920621 is a wasteful number, since it uses less digits than its factorization.

920621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3115.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 920621 is about 959.4899686813. The cubic root of 920621 is about 97.2807609486.

The spelling of 920621 in words is "nine hundred twenty thousand, six hundred twenty-one".