121856741 has 2 divisors, whose sum is σ = 121856742. Its totient is φ = 121856740.

The previous prime is 121856729. The next prime is 121856773. The reversal of 121856741 is 147658121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114939841 + 6916900 = 10721^2 + 2630^2 .

It is a cyclic number.

It is not a de Polignac number, because 121856741 - 2¹⁰ = 121855717 is a prime.

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 (121856701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60928370 + 60928371.

It is an arithmetic number, because the mean of its divisors is an integer number (60928371).

Almost surely, 2^121856741 is an apocalyptic number.

It is an amenable number.

121856741 is a deficient number, since it is larger than the sum of its proper divisors (1).

121856741 is an equidigital number, since it uses as much as digits as its factorization.

121856741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

The square root of 121856741 is about 11038.8740820792. The cubic root of 121856741 is about 495.7733596992.

The spelling of 121856741 in words is "one hundred twenty-one million, eight hundred fifty-six thousand, seven hundred forty-one".