5581405 has 4 divisors (see below), whose sum is σ = 6697692. Its totient is φ = 4465120.

The previous prime is 5581403. The next prime is 5581447. The reversal of 5581405 is 5041855.

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 2752281 + 2829124 = 1659^2 + 1682^2 .

It is not a de Polignac number, because 5581405 - 2¹ = 5581403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581403) 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, 558136 + ... + 558145.

It is an arithmetic number, because the mean of its divisors is an integer number (1674423).

Almost surely, 2^5581405 is an apocalyptic number.

It is an amenable number.

5581405 is a deficient number, since it is larger than the sum of its proper divisors (1116287).

5581405 is a wasteful number, since it uses less digits than its factorization.

5581405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116286.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 5581405 is about 2362.4997354497. The cubic root of 5581405 is about 177.3840279277.

It can be divided in two parts, 5 and 581405, that multiplied together give a square (2907025 = 1705²).

The spelling of 5581405 in words is "five million, five hundred eighty-one thousand, four hundred five".