121504543 has 2 divisors, whose sum is σ = 121504544. Its totient is φ = 121504542.

The previous prime is 121504489. The next prime is 121504547. The reversal of 121504543 is 345405121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121504543 - 2¹³ = 121496351 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121504547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60752271 + 60752272.

It is an arithmetic number, because the mean of its divisors is an integer number (60752272).

Almost surely, 2^121504543 is an apocalyptic number.

121504543 is a deficient number, since it is larger than the sum of its proper divisors (1).

121504543 is an equidigital number, since it uses as much as digits as its factorization.

121504543 is an odious number, because the sum of its binary digits is odd.

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

The square root of 121504543 is about 11022.9099152628. The cubic root of 121504543 is about 495.2952603665.

Adding to 121504543 its reverse (345405121), we get a palindrome (466909664).

The spelling of 121504543 in words is "one hundred twenty-one million, five hundred four thousand, five hundred forty-three".