5891581 has 4 divisors (see below), whose sum is σ = 6081664. Its totient is φ = 5701500.

The previous prime is 5891579. The next prime is 5891597. The reversal of 5891581 is 1851985.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5891581 - 2¹ = 5891579 is a prime.

It is a super-2 number, since 2×5891581² = 69421453359122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5891581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5891521) 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, 94995 + ... + 95056.

It is an arithmetic number, because the mean of its divisors is an integer number (1520416).

Almost surely, 2^5891581 is an apocalyptic number.

It is an amenable number.

5891581 is a deficient number, since it is larger than the sum of its proper divisors (190083).

5891581 is a wasteful number, since it uses less digits than its factorization.

5891581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190082.

The product of its digits is 14400, while the sum is 37.

The square root of 5891581 is about 2427.2579178983. The cubic root of 5891581 is about 180.6108975951.

It can be divided in two parts, 58915 and 81, that added together give a triangular number (58996 = T₃₄₃).

The spelling of 5891581 in words is "five million, eight hundred ninety-one thousand, five hundred eighty-one".