4512661 has 4 divisors (see below), whose sum is σ = 4668300. Its totient is φ = 4357024.

The previous prime is 4512653. The next prime is 4512707. The reversal of 4512661 is 1662154.

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 2047761 + 2464900 = 1431^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 4512661 - 2³ = 4512653 is a prime.

It is a Duffinian number.

4512661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4512061) 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, 77776 + ... + 77833.

It is an arithmetic number, because the mean of its divisors is an integer number (1167075).

Almost surely, 2^4512661 is an apocalyptic number.

It is an amenable number.

4512661 is a deficient number, since it is larger than the sum of its proper divisors (155639).

4512661 is a wasteful number, since it uses less digits than its factorization.

4512661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155638.

The product of its digits is 1440, while the sum is 25.

The square root of 4512661 is about 2124.3024737546. The cubic root of 4512661 is about 165.2510533874.

The spelling of 4512661 in words is "four million, five hundred twelve thousand, six hundred sixty-one".