121648145 has 4 divisors (see below), whose sum is σ = 145977780. Its totient is φ = 97318512.

The previous prime is 121648139. The next prime is 121648171. The reversal of 121648145 is 541846121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20866624 + 100781521 = 4568^2 + 10039^2 .

It is a cyclic number.

It is not a de Polignac number, because 121648145 - 2⁴ = 121648129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12164810 + ... + 12164819.

It is an arithmetic number, because the mean of its divisors is an integer number (36494445).

Almost surely, 2^121648145 is an apocalyptic number.

It is an amenable number.

121648145 is a deficient number, since it is larger than the sum of its proper divisors (24329635).

121648145 is an equidigital number, since it uses as much as digits as its factorization.

121648145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24329634.

The product of its digits is 7680, while the sum is 32.

The square root of 121648145 is about 11029.4217890151. The cubic root of 121648145 is about 495.4903076363.

The spelling of 121648145 in words is "one hundred twenty-one million, six hundred forty-eight thousand, one hundred forty-five".