1248985 has 4 divisors (see below), whose sum is σ = 1498788. Its totient is φ = 999184.

The previous prime is 1248979. The next prime is 1248991. The reversal of 1248985 is 5898421.

1248985 = T₉₁₁ + T₉₁₂ + T₉₁₃.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1248979) and next prime (1248991).

It can be written as a sum of positive squares in 2 ways, for example, as 488601 + 760384 = 699^2 + 872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1248985 - 2³ = 1248977 is a prime.

It is a Duffinian number.

1248985 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124894 + ... + 124903.

It is an arithmetic number, because the mean of its divisors is an integer number (374697).

2^1248985 is an apocalyptic number.

1248985 is the 913-rd centered triangular number.

It is an amenable number.

1248985 is a deficient number, since it is larger than the sum of its proper divisors (249803).

1248985 is an equidigital number, since it uses as much as digits as its factorization.

1248985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249802.

The product of its digits is 23040, while the sum is 37.

The square root of 1248985 is about 1117.5799747669. The cubic root of 1248985 is about 107.6925699235.

The spelling of 1248985 in words is "one million, two hundred forty-eight thousand, nine hundred eighty-five".