121776641 has 8 divisors (see below), whose sum is σ = 139248384. Its totient is φ = 104323680.

The previous prime is 121776637. The next prime is 121776659. The reversal of 121776641 is 146677121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121776641 - 2² = 121776637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121776241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14381 + ... + 21221.

It is an arithmetic number, because the mean of its divisors is an integer number (17406048).

Almost surely, 2^121776641 is an apocalyptic number.

It is an amenable number.

121776641 is a deficient number, since it is larger than the sum of its proper divisors (17471743).

121776641 is an equidigital number, since it uses as much as digits as its factorization.

121776641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9391.

The product of its digits is 14112, while the sum is 35.

The square root of 121776641 is about 11035.2453982682. The cubic root of 121776641 is about 495.6647071122.

The spelling of 121776641 in words is "one hundred twenty-one million, seven hundred seventy-six thousand, six hundred forty-one".