6635121 has 4 divisors (see below), whose sum is σ = 8846832. Its totient is φ = 4423412.

The previous prime is 6635093. The next prime is 6635129. The reversal of 6635121 is 1215366.

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.

It is a cyclic number.

It is not a de Polignac number, because 6635121 - 2⁵ = 6635089 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 6635091 and 6635100.

It is not an unprimeable number, because it can be changed into a prime (6635129) 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 3 ways as a sum of consecutive naturals, for example, 1105851 + ... + 1105856.

It is an arithmetic number, because the mean of its divisors is an integer number (2211708).

Almost surely, 2^6635121 is an apocalyptic number.

It is an amenable number.

6635121 is a deficient number, since it is larger than the sum of its proper divisors (2211711).

6635121 is a wasteful number, since it uses less digits than its factorization.

6635121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211710.

The product of its digits is 1080, while the sum is 24.

The square root of 6635121 is about 2575.8728617694. The cubic root of 6635121 is about 187.9098802264.

The spelling of 6635121 in words is "six million, six hundred thirty-five thousand, one hundred twenty-one".