1242135 has 20 divisors (see below), whose sum is σ = 2227368. Its totient is φ = 662256.

The previous prime is 1242121. The next prime is 1242151. The reversal of 1242135 is 5312421.

It is not a de Polignac number, because 1242135 - 2⁴ = 1242119 is a prime.

It is a super-4 number, since 4×1242135⁴ (a number of 25 digits) contains 4444 as substring.

It is a congruent 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 19 ways as a sum of consecutive naturals, for example, 1129 + ... + 1938.

2^1242135 is an apocalyptic number.

1242135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242135 is a deficient number, since it is larger than the sum of its proper divisors (985233).

1242135 is an equidigital number, since it uses as much as digits as its factorization.

1242135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3084 (or 3075 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1242135 is about 1114.5111035786. The cubic root of 1242135 is about 107.4953306066.

Adding to 1242135 its reverse (5312421), we get a palindrome (6554556).

The spelling of 1242135 in words is "one million, two hundred forty-two thousand, one hundred thirty-five".