665234 has 4 divisors (see below), whose sum is σ = 997854. Its totient is φ = 332616.

The previous prime is 665233. The next prime is 665239. The reversal of 665234 is 432566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 366025 + 299209 = 605^2 + 547^2 .

It is a d-powerful number, because it can be written as 6⁴ + 6⁴ + 2¹⁷ + 5³ + 3¹² + 4 .

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (665233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166307 + ... + 166310.

2⁶⁶⁵²³⁴ is an apocalyptic number.

665234 is a deficient number, since it is larger than the sum of its proper divisors (332620).

665234 is a wasteful number, since it uses less digits than its factorization.

665234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332619.

The product of its digits is 4320, while the sum is 26.

The square root of 665234 is about 815.6187835012. The cubic root of 665234 is about 87.2954241131.

The spelling of 665234 in words is "six hundred sixty-five thousand, two hundred thirty-four".