491239 has 4 divisors (see below), whose sum is σ = 561424. Its totient is φ = 421056.

The previous prime is 491219. The next prime is 491251. The reversal of 491239 is 932194.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 491239 - 2¹¹ = 489191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491219) 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, 35082 + ... + 35095.

It is an arithmetic number, because the mean of its divisors is an integer number (140356).

2⁴⁹¹²³⁹ is an apocalyptic number.

491239 is a deficient number, since it is larger than the sum of its proper divisors (70185).

491239 is an equidigital number, since it uses as much as digits as its factorization.

491239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70184.

The product of its digits is 1944, while the sum is 28.

The square root of 491239 is about 700.8844412598. The cubic root of 491239 is about 78.9037443278.

The spelling of 491239 in words is "four hundred ninety-one thousand, two hundred thirty-nine".