120640543 has 4 divisors (see below), whose sum is σ = 125885808. Its totient is φ = 115395280.

The previous prime is 120640511. The next prime is 120640571. The reversal of 120640543 is 345046021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345046021 = 3191 ⋅108131.

It is a cyclic number.

It is not a de Polignac number, because 120640543 - 2⁵ = 120640511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120640343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2622598 + ... + 2622643.

It is an arithmetic number, because the mean of its divisors is an integer number (31471452).

Almost surely, 2^120640543 is an apocalyptic number.

120640543 is a deficient number, since it is larger than the sum of its proper divisors (5245265).

120640543 is an equidigital number, since it uses as much as digits as its factorization.

120640543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5245264.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 120640543 is about 10983.6488927860. The cubic root of 120640543 is about 494.1184773226.

Adding to 120640543 its reverse (345046021), we get a palindrome (465686564).

The spelling of 120640543 in words is "one hundred twenty million, six hundred forty thousand, five hundred forty-three".