120643455 has 8 divisors (see below), whose sum is σ = 193029552. Its totient is φ = 64343168.

The previous prime is 120643429. The next prime is 120643477. The reversal of 120643455 is 554346021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120643455 - 2⁹ = 120642943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4021434 + ... + 4021463.

It is an arithmetic number, because the mean of its divisors is an integer number (24128694).

Almost surely, 2^120643455 is an apocalyptic number.

120643455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120643455 is a deficient number, since it is larger than the sum of its proper divisors (72386097).

120643455 is an equidigital number, since it uses as much as digits as its factorization.

120643455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8042905.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 120643455 is about 10983.7814526692. The cubic root of 120643455 is about 494.1224529386.

Adding to 120643455 its reverse (554346021), we get a palindrome (674989476).

The spelling of 120643455 in words is "one hundred twenty million, six hundred forty-three thousand, four hundred fifty-five".