1288249 has 2 divisors, whose sum is σ = 1288250. Its totient is φ = 1288248.

The previous prime is 1288247. The next prime is 1288291. The reversal of 1288249 is 9428821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710649 + 577600 = 843^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1288249 - 2¹ = 1288247 is a prime.

Together with 1288247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1288247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644124 + 644125.

It is an arithmetic number, because the mean of its divisors is an integer number (644125).

2^1288249 is an apocalyptic number.

It is an amenable number.

1288249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288249 is an equidigital number, since it uses as much as digits as its factorization.

1288249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 34.

The square root of 1288249 is about 1135.0105726380. The cubic root of 1288249 is about 108.8094473937.

The spelling of 1288249 in words is "one million, two hundred eighty-eight thousand, two hundred forty-nine".