7121766 has 16 divisors (see below), whose sum is σ = 14863104. Its totient is φ = 2270664.

The previous prime is 7121761. The next prime is 7121767. The reversal of 7121766 is 6671217.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121761) 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 7 ways as a sum of consecutive naturals, for example, 25666 + ... + 25941.

It is an arithmetic number, because the mean of its divisors is an integer number (928944).

Almost surely, 2^7121766 is an apocalyptic number.

7121766 is an abundant number, since it is smaller than the sum of its proper divisors (7741338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7121766 is a wasteful number, since it uses less digits than its factorization.

7121766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51635.

The product of its digits is 3528, while the sum is 30.

The square root of 7121766 is about 2668.6637105488. The cubic root of 7121766 is about 192.3959385844.

It can be divided in two parts, 7121 and 766, that added together give a palindrome (7887).

The spelling of 7121766 in words is "seven million, one hundred twenty-one thousand, seven hundred sixty-six".