12145620 has 48 divisors (see below), whose sum is σ = 34933248. Its totient is φ = 3150720.

The previous prime is 12145607. The next prime is 12145669. The reversal of 12145620 is 2654121.

It is a congruent number.

It is an unprimeable number.

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, 516 + ... + 4955.

It is an arithmetic number, because the mean of its divisors is an integer number (727776).

Almost surely, 2^12145620 is an apocalyptic number.

12145620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12145620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17466624).

12145620 is an abundant number, since it is smaller than the sum of its proper divisors (22787628).

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

12145620 is a wasteful number, since it uses less digits than its factorization.

12145620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520 (or 5518 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 12145620 is about 3485.0566709883. The cubic root of 12145620 is about 229.8652014158.

Adding to 12145620 its reverse (2654121), we get a palindrome (14799741).

The spelling of 12145620 in words is "twelve million, one hundred forty-five thousand, six hundred twenty".