258138 has 12 divisors (see below), whose sum is σ = 559338. Its totient is φ = 86040.

The previous prime is 258131. The next prime is 258143. The reversal of 258138 is 831852.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 257049 + 1089 = 507^2 + 33^2 .

It is a Curzon number.

It is a zygodrome in base 4.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258138.

It is not an unprimeable number, because it can be changed into a prime (258131) by changing a digit.

258138 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7153 + ... + 7188.

2²⁵⁸¹³⁸ is an apocalyptic number.

258138 is an abundant number, since it is smaller than the sum of its proper divisors (301200).

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

258138 is a wasteful number, since it uses less digits than its factorization.

258138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14349 (or 14346 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 258138 is about 508.0728294251. The cubic root of 258138 is about 63.6723159861.

The spelling of 258138 in words is "two hundred fifty-eight thousand, one hundred thirty-eight".