4640581 has 8 divisors (see below), whose sum is σ = 5084064. Its totient is φ = 4200720.

The previous prime is 4640567. The next prime is 4640591. The reversal of 4640581 is 1850464.

4640581 is a nontrivial binomial coefficient, being equal to C(3047, 2).

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

It is a cyclic number.

It is not a de Polignac number, because 4640581 - 2¹¹ = 4638533 is a prime.

It is a super-2 number, since 2×4640581² = 43069984035122, 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 (4640501) 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, 2286 + ... + 3808.

It is an arithmetic number, because the mean of its divisors is an integer number (635508).

Almost surely, 2^4640581 is an apocalyptic number.

4640581 is the 3046-th triangular number.

4640581 is the 1016-th centered nonagonal number.

It is an amenable number.

4640581 is a deficient number, since it is larger than the sum of its proper divisors (443483).

4640581 is a wasteful number, since it uses less digits than its factorization.

4640581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 4640581 is about 2154.2007798717. The cubic root of 4640581 is about 166.7979796254.

The spelling of 4640581 in words is "four million, six hundred forty thousand, five hundred eighty-one".