4515661 has 4 divisors (see below), whose sum is σ = 4527324. Its totient is φ = 4504000.

The previous prime is 4515631. The next prime is 4515689. The reversal of 4515661 is 1665154.

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 4473225 + 42436 = 2115^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 4515661 - 2⁵ = 4515629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4515601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5230 + ... + 6031.

It is an arithmetic number, because the mean of its divisors is an integer number (1131831).

Almost surely, 2^4515661 is an apocalyptic number.

It is an amenable number.

4515661 is a deficient number, since it is larger than the sum of its proper divisors (11663).

4515661 is a wasteful number, since it uses less digits than its factorization.

4515661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11662.

The product of its digits is 3600, while the sum is 28.

The square root of 4515661 is about 2125.0084705714. The cubic root of 4515661 is about 165.2876647011.

The spelling of 4515661 in words is "four million, five hundred fifteen thousand, six hundred sixty-one".