2488721 has 4 divisors (see below), whose sum is σ = 2535732. Its totient is φ = 2441712.

The previous prime is 2488709. The next prime is 2488723. The reversal of 2488721 is 1278842.

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 1234321 + 1254400 = 1111^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2488721 - 2¹⁰ = 2487697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2488723) 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, 23426 + ... + 23531.

It is an arithmetic number, because the mean of its divisors is an integer number (633933).

2^2488721 is an apocalyptic number.

It is an amenable number.

2488721 is a deficient number, since it is larger than the sum of its proper divisors (47011).

2488721 is an equidigital number, since it uses as much as digits as its factorization.

2488721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47010.

The product of its digits is 7168, while the sum is 32.

The square root of 2488721 is about 1577.5680650926. The cubic root of 2488721 is about 135.5164670011.

The spelling of 2488721 in words is "two million, four hundred eighty-eight thousand, seven hundred twenty-one".