2632721 has 12 divisors (see below), whose sum is σ = 3298932. Its totient is φ = 2082528.

The previous prime is 2632717. The next prime is 2632723. The reversal of 2632721 is 1272362.

It can be written as a sum of positive squares in 2 ways, for example, as 1132096 + 1500625 = 1064^2 + 1225^2 .

It is not a de Polignac number, because 2632721 - 2² = 2632717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2632723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1430 + ... + 2703.

It is an arithmetic number, because the mean of its divisors is an integer number (274911).

2^2632721 is an apocalyptic number.

It is an amenable number.

2632721 is a deficient number, since it is larger than the sum of its proper divisors (666211).

2632721 is a wasteful number, since it uses less digits than its factorization.

2632721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160 (or 4153 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 2632721 is about 1622.5661773869. The cubic root of 2632721 is about 138.0813250257.

The spelling of 2632721 in words is "two million, six hundred thirty-two thousand, seven hundred twenty-one".