253138 has 8 divisors (see below), whose sum is σ = 396288. Its totient is φ = 121044.

The previous prime is 253133. The next prime is 253153. The reversal of 253138 is 831352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (253133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2706 + ... + 2797.

It is an arithmetic number, because the mean of its divisors is an integer number (49536).

2²⁵³¹³⁸ is an apocalyptic number.

253138 is a deficient number, since it is larger than the sum of its proper divisors (143150).

253138 is a wasteful number, since it uses less digits than its factorization.

253138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5528.

The product of its digits is 720, while the sum is 22.

The square root of 253138 is about 503.1282142754. The cubic root of 253138 is about 63.2585328050.

Subtracting from 253138 its sum of digits (22), we obtain a triangular number (253116 = T₇₁₁).

It can be divided in two parts, 2 and 53138, that multiplied together give a square (106276 = 326²).

The spelling of 253138 in words is "two hundred fifty-three thousand, one hundred thirty-eight".