12020135 has 16 divisors (see below), whose sum is σ = 14937696. Its totient is φ = 9280128.

The previous prime is 12020131. The next prime is 12020137. The reversal of 12020135 is 53102021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12020135 - 2² = 12020131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17417 + ... + 18093.

It is an arithmetic number, because the mean of its divisors is an integer number (933606).

Almost surely, 2^12020135 is an apocalyptic number.

12020135 is a deficient number, since it is larger than the sum of its proper divisors (2917561).

12020135 is an equidigital number, since it uses as much as digits as its factorization.

12020135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 12020135 is about 3467.0066339712. The cubic root of 12020135 is about 229.0708259659.

Adding to 12020135 its reverse (53102021), we get a palindrome (65122156).

The spelling of 12020135 in words is "twelve million, twenty thousand, one hundred thirty-five".