2029581 has 6 divisors (see below), whose sum is σ = 2931630. Its totient is φ = 1353048.

The previous prime is 2029567. The next prime is 2029597. The reversal of 2029581 is 1859202.

It can be written as a sum of positive squares in only one way, i.e., 1334025 + 695556 = 1155^2 + 834^2 .

It is not a de Polignac number, because 2029581 - 2⁵ = 2029549 is a prime.

It is a super-2 number, since 2×2029581² = 8238398071122, 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 (2029501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112746 + ... + 112763.

It is an arithmetic number, because the mean of its divisors is an integer number (488605).

2^2029581 is an apocalyptic number.

It is an amenable number.

2029581 is a deficient number, since it is larger than the sum of its proper divisors (902049).

2029581 is a wasteful number, since it uses less digits than its factorization.

2029581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225515 (or 225512 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2029581 is about 1424.6336371152. The cubic root of 2029581 is about 126.6102295516.

The spelling of 2029581 in words is "two million, twenty-nine thousand, five hundred eighty-one".