4687561 has 4 divisors (see below), whose sum is σ = 4891392. Its totient is φ = 4483732.

The previous prime is 4687519. The next prime is 4687601. The reversal of 4687561 is 1657864.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4687561 is a prime.

It is a Duffinian number.

4687561 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4687561.

It is not an unprimeable number, because it can be changed into a prime (4687961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101881 + ... + 101926.

It is an arithmetic number, because the mean of its divisors is an integer number (1222848).

Almost surely, 2^4687561 is an apocalyptic number.

It is an amenable number.

4687561 is a deficient number, since it is larger than the sum of its proper divisors (203831).

4687561 is a wasteful number, since it uses less digits than its factorization.

4687561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203830.

The product of its digits is 40320, while the sum is 37.

The square root of 4687561 is about 2165.0775967618. The cubic root of 4687561 is about 167.3589634802.

The spelling of 4687561 in words is "four million, six hundred eighty-seven thousand, five hundred sixty-one".