2439661 has 6 divisors (see below), whose sum is σ = 2838030. Its totient is φ = 2091096.

The previous prime is 2439649. The next prime is 2439667. The reversal of 2439661 is 1669342.

It can be written as a sum of positive squares in only one way, i.e., 1768900 + 670761 = 1330^2 + 819^2 .

It is not a de Polignac number, because 2439661 - 2¹³ = 2431469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2439667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24846 + ... + 24943.

It is an arithmetic number, because the mean of its divisors is an integer number (473005).

2^2439661 is an apocalyptic number.

It is an amenable number.

2439661 is a deficient number, since it is larger than the sum of its proper divisors (398369).

2439661 is an equidigital number, since it uses as much as digits as its factorization.

2439661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49803 (or 49796 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 2439661 is about 1561.9414201563. The cubic root of 2439661 is about 134.6200749135.

The spelling of 2439661 in words is "two million, four hundred thirty-nine thousand, six hundred sixty-one".