2949581 has 4 divisors (see below), whose sum is σ = 3021564. Its totient is φ = 2877600.

The previous prime is 2949577. The next prime is 2949593. The reversal of 2949581 is 1859492.

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 292681 + 2656900 = 541^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 2949581 - 2² = 2949577 is a prime.

It is a super-2 number, since 2×2949581² = 17400056151122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2949511) 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, 35930 + ... + 36011.

It is an arithmetic number, because the mean of its divisors is an integer number (755391).

2^2949581 is an apocalyptic number.

It is an amenable number.

2949581 is a deficient number, since it is larger than the sum of its proper divisors (71983).

2949581 is an equidigital number, since it uses as much as digits as its factorization.

2949581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71982.

The product of its digits is 25920, while the sum is 38.

The square root of 2949581 is about 1717.4344237845. The cubic root of 2949581 is about 143.4124237502.

The spelling of 2949581 in words is "two million, nine hundred forty-nine thousand, five hundred eighty-one".