2431985 has 4 divisors (see below), whose sum is σ = 2918388. Its totient is φ = 1945584.

The previous prime is 2431967. The next prime is 2431987. The reversal of 2431985 is 5891342.

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 1739761 + 692224 = 1319^2 + 832^2 .

It is a cyclic number.

It is not a de Polignac number, because 2431985 - 2⁸ = 2431729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2431987) 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, 243194 + ... + 243203.

It is an arithmetic number, because the mean of its divisors is an integer number (729597).

2^2431985 is an apocalyptic number.

It is an amenable number.

2431985 is a deficient number, since it is larger than the sum of its proper divisors (486403).

2431985 is an equidigital number, since it uses as much as digits as its factorization.

2431985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486402.

The product of its digits is 8640, while the sum is 32.

The square root of 2431985 is about 1559.4822858885. The cubic root of 2431985 is about 134.4787397931.

The spelling of 2431985 in words is "two million, four hundred thirty-one thousand, nine hundred eighty-five".