1285249 has 8 divisors (see below), whose sum is σ = 1486080. Its totient is φ = 1088736.

The previous prime is 1285247. The next prime is 1285259. The reversal of 1285249 is 9425821.

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 1285249 - 2¹ = 1285247 is a prime.

It is a Duffinian number.

1285249 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1285249.

It is not an unprimeable number, because it can be changed into a prime (1285247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409 + ... + 1654.

It is an arithmetic number, because the mean of its divisors is an integer number (185760).

2^1285249 is an apocalyptic number.

It is an amenable number.

1285249 is a deficient number, since it is larger than the sum of its proper divisors (200831).

1285249 is an equidigital number, since it uses as much as digits as its factorization.

1285249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159.

The product of its digits is 5760, while the sum is 31.

The square root of 1285249 is about 1133.6882287472. The cubic root of 1285249 is about 108.7249186885.

The spelling of 1285249 in words is "one million, two hundred eighty-five thousand, two hundred forty-nine".