121056589 has 2 divisors, whose sum is σ = 121056590. Its totient is φ = 121056588.

The previous prime is 121056587. The next prime is 121056647. The reversal of 121056589 is 985650121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73239364 + 47817225 = 8558^2 + 6915^2 .

It is a cyclic number.

It is not a de Polignac number, because 121056589 - 2¹ = 121056587 is a prime.

Together with 121056587, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121056587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60528294 + 60528295.

It is an arithmetic number, because the mean of its divisors is an integer number (60528295).

Almost surely, 2^121056589 is an apocalyptic number.

It is an amenable number.

121056589 is a deficient number, since it is larger than the sum of its proper divisors (1).

121056589 is an equidigital number, since it uses as much as digits as its factorization.

121056589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 121056589 is about 11002.5719265997. The cubic root of 121056589 is about 494.6858381321.

The spelling of 121056589 in words is "one hundred twenty-one million, fifty-six thousand, five hundred eighty-nine".