121340545 has 4 divisors (see below), whose sum is σ = 145608660. Its totient is φ = 97072432.

The previous prime is 121340533. The next prime is 121340561. The reversal of 121340545 is 545043121.

It is a happy number.

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 92910321 + 28430224 = 9639^2 + 5332^2 .

It is a cyclic number.

It is not a de Polignac number, because 121340545 - 2²¹ = 119243393 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, 12134050 + ... + 12134059.

It is an arithmetic number, because the mean of its divisors is an integer number (36402165).

Almost surely, 2^121340545 is an apocalyptic number.

It is an amenable number.

121340545 is a deficient number, since it is larger than the sum of its proper divisors (24268115).

121340545 is an equidigital number, since it uses as much as digits as its factorization.

121340545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24268114.

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

The square root of 121340545 is about 11015.4684421499. The cubic root of 121340545 is about 495.0723221880.

Adding to 121340545 its reverse (545043121), we get a palindrome (666383666).

The spelling of 121340545 in words is "one hundred twenty-one million, three hundred forty thousand, five hundred forty-five".