239481 has 24 divisors (see below), whose sum is σ = 393120. Its totient is φ = 139200.

The previous prime is 239461. The next prime is 239489. The reversal of 239481 is 184932.

It is not a de Polignac number, because 239481 - 2⁶ = 239417 is a prime.

It is a super-2 number, since 2×239481² = 114702298722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 239481.

It is not an unprimeable number, because it can be changed into a prime (239489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4030 + ... + 4088.

It is an arithmetic number, because the mean of its divisors is an integer number (16380).

2²³⁹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

239481 is a deficient number, since it is larger than the sum of its proper divisors (153639).

239481 is a wasteful number, since it uses less digits than its factorization.

239481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 114 counting only the distinct ones).

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

The square root of 239481 is about 489.3679597195. The cubic root of 239481 is about 62.0998218545.

The spelling of 239481 in words is "two hundred thirty-nine thousand, four hundred eighty-one".