492509 has 4 divisors (see below), whose sum is σ = 495804. Its totient is φ = 489216.

The previous prime is 492491. The next prime is 492511. The reversal of 492509 is 905294.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 372100 + 120409 = 610^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 492509 - 2⁸ = 492253 is a prime.

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

It is a Duffinian number.

It is a plaindrome in base 15.

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 492509.

It is not an unprimeable number, because it can be changed into a prime (492409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1412 + ... + 1725.

It is an arithmetic number, because the mean of its divisors is an integer number (123951).

2⁴⁹²⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

492509 is a deficient number, since it is larger than the sum of its proper divisors (3295).

492509 is a wasteful number, since it uses less digits than its factorization.

492509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 492509 is about 701.7898545861. The cubic root of 492509 is about 78.9716824214.

It can be divided in two parts, 492 and 509, that added together give a palindrome (1001).

The spelling of 492509 in words is "four hundred ninety-two thousand, five hundred nine".