492381 has 6 divisors (see below), whose sum is σ = 711230. Its totient is φ = 328248.

The previous prime is 492377. The next prime is 492389. The reversal of 492381 is 183294.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 95481 = 630^2 + 309^2 .

It is not a de Polignac number, because 492381 - 2² = 492377 is a prime.

It is a super-2 number, since 2×492381² = 484878098322, which contains 22 as substring.

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

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27346 + ... + 27363.

2⁴⁹²³⁸¹ is an apocalyptic number.

It is an amenable number.

492381 is a deficient number, since it is larger than the sum of its proper divisors (218849).

492381 is a wasteful number, since it uses less digits than its factorization.

492381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54715 (or 54712 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 492381 is about 701.6986532693. The cubic root of 492381 is about 78.9648404137.

The spelling of 492381 in words is "four hundred ninety-two thousand, three hundred eighty-one".