12102040 has 16 divisors (see below), whose sum is σ = 27229680. Its totient is φ = 4840800.

The previous prime is 12102029. The next prime is 12102043. The reversal of 12102040 is 4020121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102043) 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 3 ways as a sum of consecutive naturals, for example, 151236 + ... + 151315.

It is an arithmetic number, because the mean of its divisors is an integer number (1701855).

Almost surely, 2^12102040 is an apocalyptic number.

12102040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102040 is an abundant number, since it is smaller than the sum of its proper divisors (15127640).

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

12102040 is a wasteful number, since it uses less digits than its factorization.

12102040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302562 (or 302558 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 12102040 is about 3478.7986432100. The cubic root of 12102040 is about 229.5899435919.

Adding to 12102040 its reverse (4020121), we get a palindrome (16122161).

The spelling of 12102040 in words is "twelve million, one hundred two thousand, forty".