120421545 has 16 divisors (see below), whose sum is σ = 194477760. Its totient is φ = 63623744.

The previous prime is 120421531. The next prime is 120421547. The reversal of 120421545 is 545124021.

It is a cyclic number.

It is not a de Polignac number, because 120421545 - 2⁷ = 120421417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120421547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35910 + ... + 39119.

It is an arithmetic number, because the mean of its divisors is an integer number (12154860).

Almost surely, 2^120421545 is an apocalyptic number.

120421545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120421545 is a deficient number, since it is larger than the sum of its proper divisors (74056215).

120421545 is a wasteful number, since it uses less digits than its factorization.

120421545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75144.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 120421545 is about 10973.6750908709. The cubic root of 120421545 is about 493.8193061928.

Adding to 120421545 its reverse (545124021), we get a palindrome (665545566).

The spelling of 120421545 in words is "one hundred twenty million, four hundred twenty-one thousand, five hundred forty-five".