4965581 has 4 divisors (see below), whose sum is σ = 5257692. Its totient is φ = 4673472.

The previous prime is 4965563. The next prime is 4965589. The reversal of 4965581 is 1855694.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1855694 = 2 ⋅927847.

It can be written as a sum of positive squares in 2 ways, for example, as 2044900 + 2920681 = 1430^2 + 1709^2 .

It is a cyclic number.

It is not a de Polignac number, because 4965581 - 2¹⁸ = 4703437 is a prime.

It is a super-2 number, since 2×4965581² = 49313989335122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4965589) 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, 146030 + ... + 146063.

It is an arithmetic number, because the mean of its divisors is an integer number (1314423).

Almost surely, 2^4965581 is an apocalyptic number.

It is an amenable number.

4965581 is a deficient number, since it is larger than the sum of its proper divisors (292111).

4965581 is a wasteful number, since it uses less digits than its factorization.

4965581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292110.

The product of its digits is 43200, while the sum is 38.

The square root of 4965581 is about 2228.3583643570. The cubic root of 4965581 is about 170.6043197932.

The spelling of 4965581 in words is "four million, nine hundred sixty-five thousand, five hundred eighty-one".