4173661 has 4 divisors (see below), whose sum is σ = 4184572. Its totient is φ = 4162752.

The previous prime is 4173641. The next prime is 4173683. The reversal of 4173661 is 1663714.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 912025 + 3261636 = 955^2 + 1806^2 .

It is a cyclic number.

It is not a de Polignac number, because 4173661 - 2⁹ = 4173149 is a prime.

It is a super-2 number, since 2×4173661² = 34838892285842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4173641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4860 + ... + 5653.

It is an arithmetic number, because the mean of its divisors is an integer number (1046143).

Almost surely, 2^4173661 is an apocalyptic number.

4173661 is the 1180-th hex number.

It is an amenable number.

4173661 is a deficient number, since it is larger than the sum of its proper divisors (10911).

4173661 is a wasteful number, since it uses less digits than its factorization.

4173661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10910.

The product of its digits is 3024, while the sum is 28.

The square root of 4173661 is about 2042.9539887134. The cubic root of 4173661 is about 161.0048864944.

It can be divided in two parts, 41736 and 61, that multiplied together give a triangular number (2545896 = T₂₂₅₆).

The spelling of 4173661 in words is "four million, one hundred seventy-three thousand, six hundred sixty-one".