120815543 has 2 divisors, whose sum is σ = 120815544. Its totient is φ = 120815542.

The previous prime is 120815507. The next prime is 120815551. The reversal of 120815543 is 345518021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120815543 - 2¹⁸ = 120553399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120815593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60407771 + 60407772.

It is an arithmetic number, because the mean of its divisors is an integer number (60407772).

Almost surely, 2^120815543 is an apocalyptic number.

120815543 is a deficient number, since it is larger than the sum of its proper divisors (1).

120815543 is an equidigital number, since it uses as much as digits as its factorization.

120815543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 120815543 is about 10991.6123930932. The cubic root of 120815543 is about 494.3572830448.

The spelling of 120815543 in words is "one hundred twenty million, eight hundred fifteen thousand, five hundred forty-three".