1242885 has 48 divisors (see below), whose sum is σ = 2462400. Its totient is φ = 532224.

The previous prime is 1242869. The next prime is 1242889. The reversal of 1242885 is 5882421.

It is not a de Polignac number, because 1242885 - 2⁴ = 1242869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242889) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 13921 + ... + 14009.

It is an arithmetic number, because the mean of its divisors is an integer number (51300).

2^1242885 is an apocalyptic number.

1242885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242885 is a deficient number, since it is larger than the sum of its proper divisors (1219515).

1242885 is a wasteful number, since it uses less digits than its factorization.

1242885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 123 counting only the distinct ones).

The product of its digits is 5120, while the sum is 30.

The square root of 1242885 is about 1114.8475232066. The cubic root of 1242885 is about 107.5169614484.

The spelling of 1242885 in words is "one million, two hundred forty-two thousand, eight hundred eighty-five".