4187661 has 16 divisors (see below), whose sum is σ = 5961024. Its totient is φ = 2605824.

The previous prime is 4187647. The next prime is 4187663. The reversal of 4187661 is 1667814.

It is a happy number.

It is not a de Polignac number, because 4187661 - 2⁶ = 4187597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4187663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7746 + ... + 8268.

It is an arithmetic number, because the mean of its divisors is an integer number (372564).

Almost surely, 2^4187661 is an apocalyptic number.

It is an amenable number.

4187661 is a deficient number, since it is larger than the sum of its proper divisors (1773363).

4187661 is a wasteful number, since it uses less digits than its factorization.

4187661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700.

The product of its digits is 8064, while the sum is 33.

The square root of 4187661 is about 2046.3775311511. The cubic root of 4187661 is about 161.1847088591.

The spelling of 4187661 in words is "four million, one hundred eighty-seven thousand, six hundred sixty-one".