121644087 has 8 divisors (see below), whose sum is σ = 164476800. Its totient is φ = 79953720.

The previous prime is 121644059. The next prime is 121644091. The reversal of 121644087 is 780446121.

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

It is not a de Polignac number, because 121644087 - 2⁸ = 121643831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121644587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285337 + ... + 285762.

It is an arithmetic number, because the mean of its divisors is an integer number (20559600).

Almost surely, 2^121644087 is an apocalyptic number.

121644087 is a deficient number, since it is larger than the sum of its proper divisors (42832713).

121644087 is an equidigital number, since it uses as much as digits as its factorization.

121644087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571173.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 121644087 is about 11029.2378249814. The cubic root of 121644087 is about 495.4847979701.

The spelling of 121644087 in words is "one hundred twenty-one million, six hundred forty-four thousand, eighty-seven".