7872449 has 4 divisors (see below), whose sum is σ = 8478036. Its totient is φ = 7266864.

The previous prime is 7872443. The next prime is 7872521. The reversal of 7872449 is 9442787.

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 5290000 + 2582449 = 2300^2 + 1607^2 .

It is a cyclic number.

It is not a de Polignac number, because 7872449 - 2¹² = 7868353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7872443) 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, 302774 + ... + 302799.

It is an arithmetic number, because the mean of its divisors is an integer number (2119509).

Almost surely, 2^7872449 is an apocalyptic number.

It is an amenable number.

7872449 is a deficient number, since it is larger than the sum of its proper divisors (605587).

7872449 is a wasteful number, since it uses less digits than its factorization.

7872449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605586.

The product of its digits is 112896, while the sum is 41.

The square root of 7872449 is about 2805.7884809800. The cubic root of 7872449 is about 198.9313753764.

It can be divided in two parts, 78 and 72449, that added together give a palindrome (72527).

The spelling of 7872449 in words is "seven million, eight hundred seventy-two thousand, four hundred forty-nine".