39481 has 4 divisors (see below), whose sum is σ = 42532. Its totient is φ = 36432.

The previous prime is 39461. The next prime is 39499. The reversal of 39481 is 18493.

39481 = 140² + 141².

39481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 19600 + 19881 = 140^2 + 141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39481 is a prime.

It is a super-2 number, since 2×39481² = 3117498722, which contains 22 as substring.

It is a Duffinian number.

39481 is a modest number, since divided by 481 gives 39 as remainder.

39481 is a lucky number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (39451) 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, 1506 + ... + 1531.

It is an arithmetic number, because the mean of its divisors is an integer number (10633).

2³⁹⁴⁸¹ is an apocalyptic number.

39481 is the 141-st centered square number.

It is an amenable number.

39481 is a deficient number, since it is larger than the sum of its proper divisors (3051).

39481 is a wasteful number, since it uses less digits than its factorization.

39481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3050.

The product of its digits is 864, while the sum is 25.

The square root of 39481 is about 198.6982637066. The cubic root of 39481 is about 34.0509616392.

The spelling of 39481 in words is "thirty-nine thousand, four hundred eighty-one".