631266 has 8 divisors (see below), whose sum is σ = 1262544. Its totient is φ = 210420.

The previous prime is 631259. The next prime is 631271. The reversal of 631266 is 662136.

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

631266 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

631266 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 3 ways as a sum of consecutive naturals, for example, 52600 + ... + 52611.

It is an arithmetic number, because the mean of its divisors is an integer number (157818).

2⁶³¹²⁶⁶ is an apocalyptic number.

631266 is the 503-rd centered pentagonal number.

631266 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

631266 is a wasteful number, since it uses less digits than its factorization.

631266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105216.

The product of its digits is 1296, while the sum is 24.

The square root of 631266 is about 794.5224981081. The cubic root of 631266 is about 85.7835733409.

The spelling of 631266 in words is "six hundred thirty-one thousand, two hundred sixty-six".