121280547 has 8 divisors (see below), whose sum is σ = 161758800. Its totient is φ = 80828000.

The previous prime is 121280531. The next prime is 121280569. The reversal of 121280547 is 745082121.

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 121280547 - 2⁴ = 121280531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121280147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12829 + ... + 20177.

It is an arithmetic number, because the mean of its divisors is an integer number (20219850).

Almost surely, 2^121280547 is an apocalyptic number.

121280547 is a deficient number, since it is larger than the sum of its proper divisors (40478253).

121280547 is an equidigital number, since it uses as much as digits as its factorization.

121280547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12853.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 121280547 is about 11012.7447532393. The cubic root of 121280547 is about 494.9907109776.

The spelling of 121280547 in words is "one hundred twenty-one million, two hundred eighty thousand, five hundred forty-seven".