121685741 has 2 divisors, whose sum is σ = 121685742. Its totient is φ = 121685740.

The previous prime is 121685737. The next prime is 121685777. The reversal of 121685741 is 147586121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83814025 + 37871716 = 9155^2 + 6154^2 .

It is a cyclic number.

It is not a de Polignac number, because 121685741 - 2² = 121685737 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121685731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60842870 + 60842871.

It is an arithmetic number, because the mean of its divisors is an integer number (60842871).

Almost surely, 2^121685741 is an apocalyptic number.

It is an amenable number.

121685741 is a deficient number, since it is larger than the sum of its proper divisors (1).

121685741 is an equidigital number, since it uses as much as digits as its factorization.

121685741 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 121685741 is about 11031.1260078017. The cubic root of 121685741 is about 495.5413470086.

The spelling of 121685741 in words is "one hundred twenty-one million, six hundred eighty-five thousand, seven hundred forty-one".