12140550 has 144 divisors (see below), whose sum is σ = 37028880. Its totient is φ = 2914560.

The previous prime is 12140549. The next prime is 12140593. The reversal of 12140550 is 5504121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 527839 + ... + 527861.

It is an arithmetic number, because the mean of its divisors is an integer number (257145).

Almost surely, 2^12140550 is an apocalyptic number.

12140550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12140550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18514440).

12140550 is an abundant number, since it is smaller than the sum of its proper divisors (24888330).

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

12140550 is a wasteful number, since it uses less digits than its factorization.

12140550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 12140550 is about 3484.3292037349. The cubic root of 12140550 is about 229.8332124143.

Adding to 12140550 its reverse (5504121), we get a palindrome (17644671).

The spelling of 12140550 in words is "twelve million, one hundred forty thousand, five hundred fifty".