7872481 has 4 divisors (see below), whose sum is σ = 8126464. Its totient is φ = 7618500.

The previous prime is 7872443. The next prime is 7872521. The reversal of 7872481 is 1842787.

7872481 is digitally balanced in base 3, 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1842787 = 137 ⋅13451.

It is a cyclic number.

It is not a de Polignac number, because 7872481 - 2⁷ = 7872353 is a prime.

It is a super-2 number, since 2×7872481² = 123951914190722, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7872481.

It is not an unprimeable number, because it can be changed into a prime (7872181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126945 + ... + 127006.

It is an arithmetic number, because the mean of its divisors is an integer number (2031616).

Almost surely, 2^7872481 is an apocalyptic number.

It is an amenable number.

7872481 is a deficient number, since it is larger than the sum of its proper divisors (253983).

7872481 is a wasteful number, since it uses less digits than its factorization.

7872481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253982.

The product of its digits is 25088, while the sum is 37.

The square root of 7872481 is about 2805.7941834711. The cubic root of 7872481 is about 198.9316449154.

The spelling of 7872481 in words is "seven million, eight hundred seventy-two thousand, four hundred eighty-one".