631842 has 32 divisors (see below), whose sum is σ = 1351680.
Its totient is φ = 196560.
The previous prime is 631819. The next prime is 631843. The reversal of 631842 is 248136.
Adding to 631842 its reverse (248136), we get a palindrome (879978).
It can be divided in two parts, 6318 and 42, that multiplied together give a triangular number (265356 = T728).
It is a happy number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631842.
It is not an unprimeable number, because it can be changed into a prime (631843) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7959 + ... + 8037.
It is an arithmetic number, because the mean of its divisors is an integer number (42240).
2631842 is an apocalyptic number.
631842 is a gapful number since it is divisible by the number (62) formed by its first and last digit.
631842 is an abundant number, since it is smaller than the sum of its proper divisors (719838).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
631842 is a wasteful number, since it uses less digits than its factorization.
631842 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 158.
The product of its digits is 1152, while the sum is 24.
The square root of 631842 is about 794.8848973279.
The cubic root of 631842 is about 85.8096565438.
The spelling of 631842 in words is "six hundred thirty-one thousand, eight hundred forty-two".