2939581 has 4 divisors (see below), whose sum is σ = 2972700. Its totient is φ = 2906464.

The previous prime is 2939579. The next prime is 2939591. The reversal of 2939581 is 1859392.

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 164025 + 2775556 = 405^2 + 1666^2 .

It is a cyclic number.

It is not a de Polignac number, because 2939581 - 2¹ = 2939579 is a prime.

It is a super-2 number, since 2×2939581² = 17282272911122, 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 2939581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2939591) 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, 16426 + ... + 16603.

It is an arithmetic number, because the mean of its divisors is an integer number (743175).

2^2939581 is an apocalyptic number.

It is an amenable number.

2939581 is a deficient number, since it is larger than the sum of its proper divisors (33119).

2939581 is an equidigital number, since it uses as much as digits as its factorization.

2939581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33118.

The product of its digits is 19440, while the sum is 37.

The square root of 2939581 is about 1714.5206327134. The cubic root of 2939581 is about 143.2501692914.

The spelling of 2939581 in words is "two million, nine hundred thirty-nine thousand, five hundred eighty-one".