492561 has 12 divisors (see below), whose sum is σ = 738192. Its totient is φ = 328212.

The previous prime is 492551. The next prime is 492563. The reversal of 492561 is 165294.

It is not a de Polignac number, because 492561 - 2¹⁰ = 491537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (492563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 771 + ... + 1256.

It is an arithmetic number, because the mean of its divisors is an integer number (61516).

2⁴⁹²⁵⁶¹ is an apocalyptic number.

It is an amenable number.

492561 is a deficient number, since it is larger than the sum of its proper divisors (245631).

492561 is an equidigital number, since it uses as much as digits as its factorization.

492561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042 (or 2030 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 492561 is about 701.8269017357. The cubic root of 492561 is about 78.9744616484.

The spelling of 492561 in words is "four hundred ninety-two thousand, five hundred sixty-one".