4981561 has 8 divisors (see below), whose sum is σ = 5680584. Its totient is φ = 4327680.

The previous prime is 4981549. The next prime is 4981579. The reversal of 4981561 is 1651894.

It can be written as a sum of positive squares in 4 ways, for example, as 1155625 + 3825936 = 1075^2 + 1956^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4981561 - 2¹³ = 4973369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4981511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11050 + ... + 11491.

It is an arithmetic number, because the mean of its divisors is an integer number (710073).

Almost surely, 2^4981561 is an apocalyptic number.

It is an amenable number.

4981561 is a deficient number, since it is larger than the sum of its proper divisors (699023).

4981561 is a wasteful number, since it uses less digits than its factorization.

4981561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22571.

The product of its digits is 8640, while the sum is 34.

The square root of 4981561 is about 2231.9410834518. The cubic root of 4981561 is about 170.7871340999.

The spelling of 4981561 in words is "four million, nine hundred eighty-one thousand, five hundred sixty-one".