121544545 has 8 divisors (see below), whose sum is σ = 147908160. Its totient is φ = 95865840.

The previous prime is 121544537. The next prime is 121544557. The reversal of 121544545 is 545445121.

It is a happy number.

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

It is not a de Polignac number, because 121544545 - 2³ = 121544537 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 170835 + ... + 171544.

It is an arithmetic number, because the mean of its divisors is an integer number (18488520).

Almost surely, 2^121544545 is an apocalyptic number.

It is an amenable number.

121544545 is a deficient number, since it is larger than the sum of its proper divisors (26363615).

121544545 is an equidigital number, since it uses as much as digits as its factorization.

121544545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342455.

The product of its digits is 16000, while the sum is 31.

The square root of 121544545 is about 11024.7242595904. The cubic root of 121544545 is about 495.3496084774.

Adding to 121544545 its reverse (545445121), we get a palindrome (666989666).

The spelling of 121544545 in words is "one hundred twenty-one million, five hundred forty-four thousand, five hundred forty-five".