6123121 has 4 divisors (see below), whose sum is σ = 6128244. Its totient is φ = 6118000.

The previous prime is 6123067. The next prime is 6123127. The reversal of 6123121 is 1213216.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2436721 + 3686400 = 1561^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 6123121 - 2⁹ = 6122609 is a prime.

It is a super-2 number, since 2×6123121² = 74985221561282, which contains 22 as substring.

It is a Duffinian number.

6123121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6123095 and 6123104.

It is not an unprimeable number, because it can be changed into a prime (6123127) 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, 291 + ... + 3511.

It is an arithmetic number, because the mean of its divisors is an integer number (1532061).

Almost surely, 2^6123121 is an apocalyptic number.

It is an amenable number.

6123121 is a deficient number, since it is larger than the sum of its proper divisors (5123).

6123121 is a wasteful number, since it uses less digits than its factorization.

6123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122.

The product of its digits is 72, while the sum is 16.

The square root of 6123121 is about 2474.4940897080. The cubic root of 6123121 is about 182.9465738313.

Adding to 6123121 its reverse (1213216), we get a palindrome (7336337).

The spelling of 6123121 in words is "six million, one hundred twenty-three thousand, one hundred twenty-one".