6627121 has 4 divisors (see below), whose sum is σ = 6644212. Its totient is φ = 6610032.

The previous prime is 6627119. The next prime is 6627139. The reversal of 6627121 is 1217266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1217266 = 2 ⋅608633.

It can be written as a sum of positive squares in 2 ways, for example, as 2217121 + 4410000 = 1489^2 + 2100^2 .

It is a cyclic number.

It is not a de Polignac number, because 6627121 - 2¹ = 6627119 is a prime.

It is a Duffinian number.

6627121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6627191) 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, 7950 + ... + 8743.

It is an arithmetic number, because the mean of its divisors is an integer number (1661053).

Almost surely, 2^6627121 is an apocalyptic number.

It is an amenable number.

6627121 is a deficient number, since it is larger than the sum of its proper divisors (17091).

6627121 is a wasteful number, since it uses less digits than its factorization.

6627121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17090.

The product of its digits is 1008, while the sum is 25.

The square root of 6627121 is about 2574.3195217377. The cubic root of 6627121 is about 187.8343285463.

The spelling of 6627121 in words is "six million, six hundred twenty-seven thousand, one hundred twenty-one".