3149581 has 4 divisors (see below), whose sum is σ = 3167164. Its totient is φ = 3132000.

The previous prime is 3149563. The next prime is 3149591. The reversal of 3149581 is 1859413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1859413 = 181 ⋅10273.

It can be written as a sum of positive squares in 2 ways, for example, as 697225 + 2452356 = 835^2 + 1566^2 .

It is a cyclic number.

It is not a de Polignac number, because 3149581 - 2¹³ = 3141389 is a prime.

It is a super-2 number, since 2×3149581² = 19839720951122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3149521) 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, 8520 + ... + 8881.

It is an arithmetic number, because the mean of its divisors is an integer number (791791).

Almost surely, 2^3149581 is an apocalyptic number.

It is an amenable number.

3149581 is a deficient number, since it is larger than the sum of its proper divisors (17583).

3149581 is a wasteful number, since it uses less digits than its factorization.

3149581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17582.

The product of its digits is 4320, while the sum is 31.

The square root of 3149581 is about 1774.7058911268. The cubic root of 3149581 is about 146.5832210131.

The spelling of 3149581 in words is "three million, one hundred forty-nine thousand, five hundred eighty-one".