731249 has 2 divisors, whose sum is σ = 731250. Its totient is φ = 731248.

The previous prime is 731243. The next prime is 731251. The reversal of 731249 is 942137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628849 + 102400 = 793^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 731249 - 2⁴ = 731233 is a prime.

Together with 731251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (731243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365624 + 365625.

It is an arithmetic number, because the mean of its divisors is an integer number (365625).

2⁷³¹²⁴⁹ is an apocalyptic number.

It is an amenable number.

731249 is a deficient number, since it is larger than the sum of its proper divisors (1).

731249 is an equidigital number, since it uses as much as digits as its factorization.

731249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 26.

The square root of 731249 is about 855.1309841188. The cubic root of 731249 is about 90.0924564279.

The spelling of 731249 in words is "seven hundred thirty-one thousand, two hundred forty-nine".