7886121 has 16 divisors (see below), whose sum is σ = 11427840. Its totient is φ = 4818960.

The previous prime is 7886111. The next prime is 7886129. The reversal of 7886121 is 1216887.

7886121 = 124² + 125² + ... + 294².

It is a happy number.

It is not a de Polignac number, because 7886121 - 2⁷ = 7885993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7886129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465 + ... + 3998.

It is an arithmetic number, because the mean of its divisors is an integer number (714240).

Almost surely, 2^7886121 is an apocalyptic number.

It is an amenable number.

7886121 is a deficient number, since it is larger than the sum of its proper divisors (3541719).

7886121 is a wasteful number, since it uses less digits than its factorization.

7886121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516.

The product of its digits is 5376, while the sum is 33.

The square root of 7886121 is about 2808.2238158665. The cubic root of 7886121 is about 199.0464694556.

The spelling of 7886121 in words is "seven million, eight hundred eighty-six thousand, one hundred twenty-one".