1248705 has 12 divisors (see below), whose sum is σ = 2164500. Its totient is φ = 665952.

The previous prime is 1248703. The next prime is 1248721. The reversal of 1248705 is 5078421.

It can be written as a sum of positive squares in 2 ways, for example, as 389376 + 859329 = 624^2 + 927^2 .

It is not a de Polignac number, because 1248705 - 2¹ = 1248703 is a prime.

1248705 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1248703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13830 + ... + 13919.

It is an arithmetic number, because the mean of its divisors is an integer number (180375).

2^1248705 is an apocalyptic number.

1248705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1248705 is a deficient number, since it is larger than the sum of its proper divisors (915795).

1248705 is a wasteful number, since it uses less digits than its factorization.

1248705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27760 (or 27757 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1248705 is about 1117.4546970683. The cubic root of 1248705 is about 107.6845217422.

It can be divided in two parts, 1248 and 705, that added together give a triangular number (1953 = T₆₂).

The spelling of 1248705 in words is "one million, two hundred forty-eight thousand, seven hundred five".