3391581 has 4 divisors (see below), whose sum is σ = 4522112. Its totient is φ = 2261052.

The previous prime is 3391559. The next prime is 3391601. The reversal of 3391581 is 1851933.

It is a happy number.

3391581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1851933 = 3 ⋅617311.

It is a de Polignac number, because none of the positive numbers 2^k-3391581 is a prime.

It is a super-2 number, since 2×3391581² = 23005643359122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3391081) 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, 565261 + ... + 565266.

It is an arithmetic number, because the mean of its divisors is an integer number (1130528).

Almost surely, 2^3391581 is an apocalyptic number.

It is an amenable number.

3391581 is a deficient number, since it is larger than the sum of its proper divisors (1130531).

3391581 is a wasteful number, since it uses less digits than its factorization.

3391581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130530.

The product of its digits is 3240, while the sum is 30.

The square root of 3391581 is about 1841.6245545713. The cubic root of 3391581 is about 150.2452432642.

The spelling of 3391581 in words is "three million, three hundred ninety-one thousand, five hundred eighty-one".