249138 has 12 divisors (see below), whose sum is σ = 539838. Its totient is φ = 83040.

The previous prime is 249133. The next prime is 249143. The reversal of 249138 is 831942.

249138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (249133) and next prime (249143).

It can be written as a sum of positive squares in only one way, i.e., 227529 + 21609 = 477^2 + 147^2 .

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 249138.

It is not an unprimeable number, because it can be changed into a prime (249131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6903 + ... + 6938.

2²⁴⁹¹³⁸ is an apocalyptic number.

249138 is an abundant number, since it is smaller than the sum of its proper divisors (290700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249138 is a wasteful number, since it uses less digits than its factorization.

249138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13849 (or 13846 counting only the distinct ones).

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

The square root of 249138 is about 499.1372556722. The cubic root of 249138 is about 62.9235656563.

The spelling of 249138 in words is "two hundred forty-nine thousand, one hundred thirty-eight".