7921143 has 6 divisors (see below), whose sum is σ = 11441664. Its totient is φ = 5280756.

The previous prime is 7921141. The next prime is 7921153. The reversal of 7921143 is 3411297.

It is not a de Polignac number, because 7921143 - 2¹ = 7921141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 440055 + ... + 440072.

It is an arithmetic number, because the mean of its divisors is an integer number (1906944).

Almost surely, 2^7921143 is an apocalyptic number.

7921143 is a deficient number, since it is larger than the sum of its proper divisors (3520521).

7921143 is a wasteful number, since it uses less digits than its factorization.

7921143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880133 (or 880130 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 7921143 is about 2814.4525222501. The cubic root of 7921143 is about 199.3406872552.

The spelling of 7921143 in words is "seven million, nine hundred twenty-one thousand, one hundred forty-three".