4571661 has 8 divisors (see below), whose sum is σ = 6133600. Its totient is φ = 3028752.

The previous prime is 4571629. The next prime is 4571681. The reversal of 4571661 is 1661754.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4571661 - 2⁵ = 4571629 is a prime.

It is a super-3 number, since 3×4571661³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

4571661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4571681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4186 + ... + 5163.

It is an arithmetic number, because the mean of its divisors is an integer number (766700).

Almost surely, 2^4571661 is an apocalyptic number.

It is an amenable number.

4571661 is a deficient number, since it is larger than the sum of its proper divisors (1561939).

4571661 is a wasteful number, since it uses less digits than its factorization.

4571661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9515.

The product of its digits is 5040, while the sum is 30.

The square root of 4571661 is about 2138.1442888636. The cubic root of 4571661 is about 165.9681193918.

The spelling of 4571661 in words is "four million, five hundred seventy-one thousand, six hundred sixty-one".