2631641 has 4 divisors (see below), whose sum is σ = 2661300. Its totient is φ = 2601984.

The previous prime is 2631631. The next prime is 2631647. The reversal of 2631641 is 1461362.

It is a happy number.

2631641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 931225 + 1700416 = 965^2 + 1304^2 .

It is a cyclic number.

It is not a de Polignac number, because 2631641 - 2¹⁴ = 2615257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2631647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14696 + ... + 14873.

It is an arithmetic number, because the mean of its divisors is an integer number (665325).

2^2631641 is an apocalyptic number.

It is an amenable number.

2631641 is a deficient number, since it is larger than the sum of its proper divisors (29659).

2631641 is an equidigital number, since it uses as much as digits as its factorization.

2631641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29658.

The product of its digits is 864, while the sum is 23.

The square root of 2631641 is about 1622.2333371004. The cubic root of 2631641 is about 138.0624411121.

The spelling of 2631641 in words is "two million, six hundred thirty-one thousand, six hundred forty-one".