631541 has 8 divisors (see below), whose sum is σ = 681120. Its totient is φ = 583632.

The previous prime is 631537. The next prime is 631549. The reversal of 631541 is 145136.

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

It is a cyclic number.

It is not a de Polignac number, because 631541 - 2² = 631537 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431 + ... + 1203.

It is an arithmetic number, because the mean of its divisors is an integer number (85140).

2⁶³¹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

631541 is a deficient number, since it is larger than the sum of its proper divisors (49579).

631541 is a wasteful number, since it uses less digits than its factorization.

631541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835.

The product of its digits is 360, while the sum is 20.

The square root of 631541 is about 794.6955391847. The cubic root of 631541 is about 85.7960282373.

Adding to 631541 its reverse (145136), we get a palindrome (776677).

The spelling of 631541 in words is "six hundred thirty-one thousand, five hundred forty-one".