4641561 has 24 divisors (see below), whose sum is σ = 7413120. Its totient is φ = 2783616.

The previous prime is 4641557. The next prime is 4641563. The reversal of 4641561 is 1651464.

It is not a de Polignac number, because 4641561 - 2² = 4641557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4641563) 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 23 ways as a sum of consecutive naturals, for example, 2860 + ... + 4178.

It is an arithmetic number, because the mean of its divisors is an integer number (308880).

Almost surely, 2^4641561 is an apocalyptic number.

It is an amenable number.

4641561 is a deficient number, since it is larger than the sum of its proper divisors (2771559).

4641561 is a wasteful number, since it uses less digits than its factorization.

4641561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365 (or 1362 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 4641561 is about 2154.4282304129. The cubic root of 4641561 is about 166.8097202899.

It can be divided in two parts, 464 and 1561, that added together give a square (2025 = 45²).

The spelling of 4641561 in words is "four million, six hundred forty-one thousand, five hundred sixty-one".