4961581 has 8 divisors (see below), whose sum is σ = 5299200. Its totient is φ = 4635120.

The previous prime is 4961563. The next prime is 4961587. The reversal of 4961581 is 1851694.

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

It is not a de Polignac number, because 4961581 - 2⁵ = 4961549 is a prime.

It is a super-2 number, since 2×4961581² = 49234572039122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4961587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1861 + ... + 3658.

It is an arithmetic number, because the mean of its divisors is an integer number (662400).

Almost surely, 2^4961581 is an apocalyptic number.

It is an amenable number.

4961581 is a deficient number, since it is larger than the sum of its proper divisors (337619).

4961581 is a wasteful number, since it uses less digits than its factorization.

4961581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579.

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

The square root of 4961581 is about 2227.4606618300. The cubic root of 4961581 is about 170.5584976561.

The spelling of 4961581 in words is "four million, nine hundred sixty-one thousand, five hundred eighty-one".