121748761 has 2 divisors, whose sum is σ = 121748762. Its totient is φ = 121748760.

The previous prime is 121748719. The next prime is 121748807. The reversal of 121748761 is 167847121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120582361 + 1166400 = 10981^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 121748761 - 2²⁵ = 88194329 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121748761.

It is not a weakly prime, because it can be changed into another prime (121748701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60874380 + 60874381.

It is an arithmetic number, because the mean of its divisors is an integer number (60874381).

Almost surely, 2^121748761 is an apocalyptic number.

It is an amenable number.

121748761 is a deficient number, since it is larger than the sum of its proper divisors (1).

121748761 is an equidigital number, since it uses as much as digits as its factorization.

121748761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 37.

The square root of 121748761 is about 11033.9821007649. The cubic root of 121748761 is about 495.6268777807.

The spelling of 121748761 in words is "one hundred twenty-one million, seven hundred forty-eight thousand, seven hundred sixty-one".