7888121 has 4 divisors (see below), whose sum is σ = 7894272. Its totient is φ = 7881972.

The previous prime is 7888117. The next prime is 7888157. The reversal of 7888121 is 1218887.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1218887 = 953 ⋅1279.

It is a cyclic number.

It is not a de Polignac number, because 7888121 - 2² = 7888117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7888421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341 + ... + 3986.

It is an arithmetic number, because the mean of its divisors is an integer number (1973568).

Almost surely, 2^7888121 is an apocalyptic number.

It is an amenable number.

7888121 is a deficient number, since it is larger than the sum of its proper divisors (6151).

7888121 is a wasteful number, since it uses less digits than its factorization.

7888121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6150.

The product of its digits is 7168, while the sum is 35.

The square root of 7888121 is about 2808.5798902648. The cubic root of 7888121 is about 199.0632947655.

The spelling of 7888121 in words is "seven million, eight hundred eighty-eight thousand, one hundred twenty-one".