121345145 has 8 divisors (see below), whose sum is σ = 145686600. Its totient is φ = 97027840.

The previous prime is 121345121. The next prime is 121345151. The reversal of 121345145 is 541543121.

It can be written as a sum of positive squares in 4 ways, for example, as 32684089 + 88661056 = 5717^2 + 9416^2 .

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

It is not a de Polignac number, because 121345145 - 2⁸ = 121344889 is a prime.

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, 7985 + ... + 17505.

It is an arithmetic number, because the mean of its divisors is an integer number (18210825).

Almost surely, 2^121345145 is an apocalyptic number.

It is an amenable number.

121345145 is a deficient number, since it is larger than the sum of its proper divisors (24341455).

121345145 is an equidigital number, since it uses as much as digits as its factorization.

121345145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12075.

The product of its digits is 2400, while the sum is 26.

The square root of 121345145 is about 11015.6772374648. The cubic root of 121345145 is about 495.0785781456.

Adding to 121345145 its reverse (541543121), we get a palindrome (662888266).

The spelling of 121345145 in words is "one hundred twenty-one million, three hundred forty-five thousand, one hundred forty-five".