920521 has 8 divisors (see below), whose sum is σ = 1062720. Its totient is φ = 781008.

The previous prime is 920519. The next prime is 920539. The reversal of 920521 is 125029.

920521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 920521 - 2¹ = 920519 is a prime.

It is a super-2 number, since 2×920521² = 1694717822882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920561) 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, 135 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (132840).

2⁹²⁰⁵²¹ is an apocalyptic number.

It is an amenable number.

920521 is a deficient number, since it is larger than the sum of its proper divisors (142199).

920521 is a wasteful number, since it uses less digits than its factorization.

920521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 920521 is about 959.4378562471. The cubic root of 920521 is about 97.2772385333.

It can be divided in two parts, 920 and 521, that added together give a palindrome (1441).

The spelling of 920521 in words is "nine hundred twenty thousand, five hundred twenty-one".