121455105 has 8 divisors (see below), whose sum is σ = 194328192. Its totient is φ = 64776048.

The previous prime is 121455077. The next prime is 121455107. The reversal of 121455105 is 501554121.

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

It is not a de Polignac number, because 121455105 - 2⁸ = 121454849 is a prime.

It is a super-2 number, since 2×121455105² = 29502685061122050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121455107) 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, 4048489 + ... + 4048518.

It is an arithmetic number, because the mean of its divisors is an integer number (24291024).

Almost surely, 2^121455105 is an apocalyptic number.

121455105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121455105 is a deficient number, since it is larger than the sum of its proper divisors (72873087).

121455105 is an equidigital number, since it uses as much as digits as its factorization.

121455105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8097015.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 121455105 is about 11020.6671758111. The cubic root of 121455105 is about 495.2280756938.

The spelling of 121455105 in words is "one hundred twenty-one million, four hundred fifty-five thousand, one hundred five".