262138 has 8 divisors (see below), whose sum is σ = 400788. Its totient is φ = 128544.

The previous prime is 262133. The next prime is 262139. The reversal of 262138 is 831262.

It can be written as a sum of positive squares in 2 ways, for example, as 247009 + 15129 = 497^2 + 123^2 .

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

It is a nialpdrome in base 4 and base 8.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (262133) 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, 1131 + ... + 1342.

262138 is a Friedman number, since it can be written as 8^((2+1)^2-3)-6, using all its digits and the basic arithmetic operations.

2²⁶²¹³⁸ is an apocalyptic number.

262138 is a deficient number, since it is larger than the sum of its proper divisors (138650).

262138 is a wasteful number, since it uses less digits than its factorization.

262138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528.

The product of its digits is 576, while the sum is 22.

The square root of 262138 is about 511.9941405915. The cubic root of 262138 is about 63.9995117150. Note that the first 3 decimals are identical.

It can be divided in two parts, 262 and 138, that added together give a square (400 = 20²).

The spelling of 262138 in words is "two hundred sixty-two thousand, one hundred thirty-eight".