6112721 has 2 divisors, whose sum is σ = 6112722. Its totient is φ = 6112720.

The previous prime is 6112709. The next prime is 6112723. The reversal of 6112721 is 1272116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4999696 + 1113025 = 2236^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 6112721 - 2⁶ = 6112657 is a prime.

Together with 6112723, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6112693 and 6112702.

It is not a weakly prime, because it can be changed into another prime (6112723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3056360 + 3056361.

It is an arithmetic number, because the mean of its divisors is an integer number (3056361).

Almost surely, 2^6112721 is an apocalyptic number.

It is an amenable number.

6112721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6112721 is an equidigital number, since it uses as much as digits as its factorization.

6112721 is an evil number, because the sum of its binary digits is even.

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

The square root of 6112721 is about 2472.3917569835. The cubic root of 6112721 is about 182.8429380881.

Adding to 6112721 its reverse (1272116), we get a palindrome (7384837).

The spelling of 6112721 in words is "six million, one hundred twelve thousand, seven hundred twenty-one".