631642 has 8 divisors (see below), whose sum is σ = 1033632. Its totient is φ = 287100.

The previous prime is 631619. The next prime is 631643. The reversal of 631642 is 246136.

631642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 28711 = 631642 / (6 + 3 + 1 + 6 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (631643) 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, 14334 + ... + 14377.

It is an arithmetic number, because the mean of its divisors is an integer number (129204).

2⁶³¹⁶⁴² is an apocalyptic number.

631642 is a deficient number, since it is larger than the sum of its proper divisors (401990).

631642 is a wasteful number, since it uses less digits than its factorization.

631642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28724.

The product of its digits is 864, while the sum is 22.

The square root of 631642 is about 794.7590829931. The cubic root of 631642 is about 85.8006016733.

Adding to 631642 its reverse (246136), we get a palindrome (877778).

The spelling of 631642 in words is "six hundred thirty-one thousand, six hundred forty-two".