4661605 has 16 divisors (see below), whose sum is σ = 6234480. Its totient is φ = 3322368.

The previous prime is 4661581. The next prime is 4661609. The reversal of 4661605 is 5061664.

It can be written as a sum of positive squares in 8 ways, for example, as 73441 + 4588164 = 271^2 + 2142^2 .

It is a cyclic number.

It is not a de Polignac number, because 4661605 - 2⁷ = 4661477 is a prime.

It is a super-2 number, since 2×4661605² = 43461122352050, which contains 22 as substring.

4661605 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4661609) 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, 649 + ... + 3121.

It is an arithmetic number, because the mean of its divisors is an integer number (389655).

Almost surely, 2^4661605 is an apocalyptic number.

It is an amenable number.

4661605 is a deficient number, since it is larger than the sum of its proper divisors (1572875).

4661605 is a wasteful number, since it uses less digits than its factorization.

4661605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 4661605 is about 2159.0750334345. The cubic root of 4661605 is about 167.0494911105.

The spelling of 4661605 in words is "four million, six hundred sixty-one thousand, six hundred five".