121234145 has 8 divisors (see below), whose sum is σ = 147866280. Its totient is φ = 95397120.

The previous prime is 121234121. The next prime is 121234159. The reversal of 121234145 is 541432121.

It can be written as a sum of positive squares in 4 ways, for example, as 58081 + 121176064 = 241^2 + 11008^2 .

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

It is not a de Polignac number, because 121234145 - 2¹⁰ = 121233121 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 121234145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198440 + ... + 199049.

It is an arithmetic number, because the mean of its divisors is an integer number (18483285).

Almost surely, 2^121234145 is an apocalyptic number.

It is an amenable number.

121234145 is a deficient number, since it is larger than the sum of its proper divisors (26632135).

121234145 is an equidigital number, since it uses as much as digits as its factorization.

121234145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397555.

The product of its digits is 960, while the sum is 23.

The square root of 121234145 is about 11010.6378107719. The cubic root of 121234145 is about 494.9275750243.

Adding to 121234145 its reverse (541432121), we get a palindrome (662666266).

The spelling of 121234145 in words is "one hundred twenty-one million, two hundred thirty-four thousand, one hundred forty-five".