121541863 has 4 divisors (see below), whose sum is σ = 122346928. Its totient is φ = 120736800.

The previous prime is 121541809. The next prime is 121541869. The reversal of 121541863 is 368145121.

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

It is a cyclic number.

It is not a de Polignac number, because 121541863 - 2⁹ = 121541351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121541869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402306 + ... + 402607.

It is an arithmetic number, because the mean of its divisors is an integer number (30586732).

Almost surely, 2^121541863 is an apocalyptic number.

121541863 is a deficient number, since it is larger than the sum of its proper divisors (805065).

121541863 is an equidigital number, since it uses as much as digits as its factorization.

121541863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805064.

The product of its digits is 5760, while the sum is 31.

The square root of 121541863 is about 11024.6026232241. The cubic root of 121541863 is about 495.3459649917.

Adding to 121541863 its reverse (368145121), we get a palindrome (489686984).

The spelling of 121541863 in words is "one hundred twenty-one million, five hundred forty-one thousand, eight hundred sixty-three".