12001902 has 32 divisors (see below), whose sum is σ = 26801280. Its totient is φ = 3551520.

The previous prime is 12001897. The next prime is 12001909. The reversal of 12001902 is 20910021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001909) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 724 + ... + 4952.

It is an arithmetic number, because the mean of its divisors is an integer number (837540).

Almost surely, 2^12001902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12001902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13400640).

12001902 is an abundant number, since it is smaller than the sum of its proper divisors (14799378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12001902 is a wasteful number, since it uses less digits than its factorization.

12001902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 12001902 is about 3464.3761343134. The cubic root of 12001902 is about 228.9549436855.

Adding to 12001902 its reverse (20910021), we get a palindrome (32911923).

The spelling of 12001902 in words is "twelve million, one thousand, nine hundred two".