5409581 has 4 divisors (see below), whose sum is σ = 5541564. Its totient is φ = 5277600.

The previous prime is 5409571. The next prime is 5409583. The reversal of 5409581 is 1859045.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 855625 + 4553956 = 925^2 + 2134^2 .

It is a cyclic number.

It is not a de Polignac number, because 5409581 - 2⁶ = 5409517 is a prime.

It is a super-2 number, since 2×5409581² = 58527133191122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5409583) 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 3 ways as a sum of consecutive naturals, for example, 65930 + ... + 66011.

It is an arithmetic number, because the mean of its divisors is an integer number (1385391).

Almost surely, 2^5409581 is an apocalyptic number.

It is an amenable number.

5409581 is a deficient number, since it is larger than the sum of its proper divisors (131983).

5409581 is a wasteful number, since it uses less digits than its factorization.

5409581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131982.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 5409581 is about 2325.8505970935. The cubic root of 5409581 is about 175.5447622988.

The spelling of 5409581 in words is "five million, four hundred nine thousand, five hundred eighty-one".