6118561 has 2 divisors, whose sum is σ = 6118562. Its totient is φ = 6118560.

The previous prime is 6118559. The next prime is 6118571. The reversal of 6118561 is 1658116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5688225 + 430336 = 2385^2 + 656^2 .

It is a cyclic number.

It is not a de Polignac number, because 6118561 - 2¹ = 6118559 is a prime.

Together with 6118559, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6118571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3059280 + 3059281.

It is an arithmetic number, because the mean of its divisors is an integer number (3059281).

Almost surely, 2^6118561 is an apocalyptic number.

It is an amenable number.

6118561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6118561 is an equidigital number, since it uses as much as digits as its factorization.

6118561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 28.

The square root of 6118561 is about 2473.5725176352. The cubic root of 6118561 is about 182.9011480018.

The spelling of 6118561 in words is "six million, one hundred eighteen thousand, five hundred sixty-one".