631249 has 2 divisors, whose sum is σ = 631250. Its totient is φ = 631248.

The previous prime is 631247. The next prime is 631259. The reversal of 631249 is 942136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336400 + 294849 = 580^2 + 543^2 .

It is a cyclic number.

It is not a de Polignac number, because 631249 - 2¹ = 631247 is a prime.

Together with 631247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (631247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315624 + 315625.

It is an arithmetic number, because the mean of its divisors is an integer number (315625).

2⁶³¹²⁴⁹ is an apocalyptic number.

It is an amenable number.

631249 is a deficient number, since it is larger than the sum of its proper divisors (1).

631249 is an equidigital number, since it uses as much as digits as its factorization.

631249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 631249 is about 794.5117997865. The cubic root of 631249 is about 85.7828032832.

It can be divided in two parts, 63 and 1249, that multiplied together give a palindrome (78687).

The spelling of 631249 in words is "six hundred thirty-one thousand, two hundred forty-nine".