631001 has 8 divisors (see below), whose sum is σ = 728640. Its totient is φ = 535248.

The previous prime is 630997. The next prime is 631003. The reversal of 631001 is 100136.

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

It is not a de Polignac number, because 631001 - 2² = 630997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350 + ... + 1176.

It is an arithmetic number, because the mean of its divisors is an integer number (91080).

2⁶³¹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

631001 is a deficient number, since it is larger than the sum of its proper divisors (97639).

631001 is a wasteful number, since it uses less digits than its factorization.

631001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 631001 is about 794.3557137706. The cubic root of 631001 is about 85.7715679271.

Adding to 631001 its reverse (100136), we get a palindrome (731137).

The spelling of 631001 in words is "six hundred thirty-one thousand, one".