121304545 has 16 divisors (see below), whose sum is σ = 148750992. Its totient is φ = 94931200.

The previous prime is 121304501. The next prime is 121304551. The reversal of 121304545 is 545403121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1336336 + 119968209 = 1156^2 + 10953^2 .

It is not a de Polignac number, because 121304545 - 2²¹ = 119207393 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 172695 + ... + 173395.

It is an arithmetic number, because the mean of its divisors is an integer number (9296937).

Almost surely, 2^121304545 is an apocalyptic number.

It is an amenable number.

121304545 is a deficient number, since it is larger than the sum of its proper divisors (27446447).

121304545 is an equidigital number, since it uses as much as digits as its factorization.

121304545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 121304545 is about 11013.8342551538. The cubic root of 121304545 is about 495.0233570586.

Adding to 121304545 its reverse (545403121), we get a palindrome (666707666).

The spelling of 121304545 in words is "one hundred twenty-one million, three hundred four thousand, five hundred forty-five".