121752761 has 4 divisors (see below), whose sum is σ = 131118372. Its totient is φ = 112387152.

The previous prime is 121752749. The next prime is 121752769. The reversal of 121752761 is 167257121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55428025 + 66324736 = 7445^2 + 8144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121752761 is a prime.

It is a super-2 number, since 2×121752761² = 29647469622246242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121752769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4682786 + ... + 4682811.

It is an arithmetic number, because the mean of its divisors is an integer number (32779593).

Almost surely, 2^121752761 is an apocalyptic number.

It is an amenable number.

121752761 is a deficient number, since it is larger than the sum of its proper divisors (9365611).

121752761 is an equidigital number, since it uses as much as digits as its factorization.

121752761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9365610.

The product of its digits is 5880, while the sum is 32.

The square root of 121752761 is about 11034.1633575002. The cubic root of 121752761 is about 495.6323055863.

The spelling of 121752761 in words is "one hundred twenty-one million, seven hundred fifty-two thousand, seven hundred sixty-one".