1242585 has 24 divisors (see below), whose sum is σ = 2198664. Its totient is φ = 648960.

The previous prime is 1242569. The next prime is 1242601. The reversal of 1242585 is 5852421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1242569) and next prime (1242601).

It can be written as a sum of positive squares in 4 ways, for example, as 127449 + 1115136 = 357^2 + 1056^2 .

It is not a de Polignac number, because 1242585 - 2⁴ = 1242569 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2125 + ... + 2645.

It is an arithmetic number, because the mean of its divisors is an integer number (91611).

2^1242585 is an apocalyptic number.

1242585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242585 is a deficient number, since it is larger than the sum of its proper divisors (956079).

1242585 is a wasteful number, since it uses less digits than its factorization.

1242585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 582 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1242585 is about 1114.7129675392. The cubic root of 1242585 is about 107.5083101562.

The spelling of 1242585 in words is "one million, two hundred forty-two thousand, five hundred eighty-five".