4208661 has 6 divisors (see below), whose sum is σ = 6079190. Its totient is φ = 2805768.

The previous prime is 4208657. The next prime is 4208689. The reversal of 4208661 is 1668024.

It can be written as a sum of positive squares in only one way, i.e., 2160900 + 2047761 = 1470^2 + 1431^2 .

It is not a de Polignac number, because 4208661 - 2² = 4208657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4208621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 233806 + ... + 233823.

Almost surely, 2^4208661 is an apocalyptic number.

It is an amenable number.

4208661 is a deficient number, since it is larger than the sum of its proper divisors (1870529).

4208661 is a wasteful number, since it uses less digits than its factorization.

4208661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467635 (or 467632 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 4208661 is about 2051.5021325848. The cubic root of 4208661 is about 161.4536924683.

The spelling of 4208661 in words is "four million, two hundred eight thousand, six hundred sixty-one".