905249 has 2 divisors, whose sum is σ = 905250. Its totient is φ = 905248.

The previous prime is 905227. The next prime is 905269. The reversal of 905249 is 942509.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 739600 + 165649 = 860^2 + 407^2 .

It is an emirp because it is prime and its reverse (942509) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-905249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (905209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452624 + 452625.

It is an arithmetic number, because the mean of its divisors is an integer number (452625).

2⁹⁰⁵²⁴⁹ is an apocalyptic number.

It is an amenable number.

905249 is a deficient number, since it is larger than the sum of its proper divisors (1).

905249 is an equidigital number, since it uses as much as digits as its factorization.

905249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 905249 is about 951.4457420158. The cubic root of 905249 is about 96.7362730271.

The spelling of 905249 in words is "nine hundred five thousand, two hundred forty-nine".