7121799 has 6 divisors (see below), whose sum is σ = 10287056. Its totient is φ = 4747860.

The previous prime is 7121773. The next prime is 7121801. The reversal of 7121799 is 9971217.

It is not a de Polignac number, because 7121799 - 2⁵ = 7121767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121399) 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 5 ways as a sum of consecutive naturals, for example, 395647 + ... + 395664.

Almost surely, 2^7121799 is an apocalyptic number.

7121799 is a deficient number, since it is larger than the sum of its proper divisors (3165257).

7121799 is a wasteful number, since it uses less digits than its factorization.

7121799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791317 (or 791314 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 7121799 is about 2668.6698934113. The cubic root of 7121799 is about 192.3962357512.

The spelling of 7121799 in words is "seven million, one hundred twenty-one thousand, seven hundred ninety-nine".