4121660 has 12 divisors (see below), whose sum is σ = 8655528. Its totient is φ = 1648656.

The previous prime is 4121657. The next prime is 4121687. The reversal of 4121660 is 661214.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 206083 = 4121660 / (4 + 1 + 2 + 1 + 6 + 6 + 0).

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 3 ways as a sum of consecutive naturals, for example, 103022 + ... + 103061.

It is an arithmetic number, because the mean of its divisors is an integer number (721294).

Almost surely, 2^4121660 is an apocalyptic number.

It is an amenable number.

4121660 is an abundant number, since it is smaller than the sum of its proper divisors (4533868).

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

4121660 is a wasteful number, since it uses less digits than its factorization.

4121660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206092 (or 206090 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4121660 is about 2030.1871834883. The cubic root of 4121660 is about 160.3334192980. Note that the first 3 decimals are identical.

Adding to 4121660 its reverse (661214), we get a palindrome (4782874).

The spelling of 4121660 in words is "four million, one hundred twenty-one thousand, six hundred sixty".