1245985 has 16 divisors (see below), whose sum is σ = 1668240. Its totient is φ = 887040.

The previous prime is 1245973. The next prime is 1246013. The reversal of 1245985 is 5895421.

It can be written as a sum of positive squares in 8 ways, for example, as 11664 + 1234321 = 108^2 + 1111^2 .

It is not a de Polignac number, because 1245985 - 2⁵ = 1245953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1245985.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1555 + ... + 2215.

It is an arithmetic number, because the mean of its divisors is an integer number (104265).

2^1245985 is an apocalyptic number.

It is an amenable number.

1245985 is a deficient number, since it is larger than the sum of its proper divisors (422255).

1245985 is a wasteful number, since it uses less digits than its factorization.

1245985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708.

The product of its digits is 14400, while the sum is 34.

The square root of 1245985 is about 1116.2369820070. The cubic root of 1245985 is about 107.6062767260.

It can be divided in two parts, 12459 and 85, that added together give a square (12544 = 112²).

The spelling of 1245985 in words is "one million, two hundred forty-five thousand, nine hundred eighty-five".