6172121 has 4 divisors (see below), whose sum is σ = 6207972. Its totient is φ = 6136272.

The previous prime is 6172109. The next prime is 6172123. The reversal of 6172121 is 1212716.

6172121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5040025 + 1132096 = 2245^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 6172121 - 2¹⁰ = 6171097 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6172093 and 6172102.

It is not an unprimeable number, because it can be changed into a prime (6172123) 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, 17666 + ... + 18011.

It is an arithmetic number, because the mean of its divisors is an integer number (1551993).

Almost surely, 2^6172121 is an apocalyptic number.

It is an amenable number.

6172121 is a deficient number, since it is larger than the sum of its proper divisors (35851).

6172121 is a wasteful number, since it uses less digits than its factorization.

6172121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35850.

The product of its digits is 168, while the sum is 20.

The square root of 6172121 is about 2484.3753742138. The cubic root of 6172121 is about 183.4332850749.

Adding to 6172121 its reverse (1212716), we get a palindrome (7384837).

The spelling of 6172121 in words is "six million, one hundred seventy-two thousand, one hundred twenty-one".