120143506 has 32 divisors (see below), whose sum is σ = 209784960. Its totient is φ = 50544000.

The previous prime is 120143501. The next prime is 120143509. The reversal of 120143506 is 605341021.

It is not an unprimeable number, because it can be changed into a prime (120143501) 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, 199606 + ... + 200206.

It is an arithmetic number, because the mean of its divisors is an integer number (6555780).

Almost surely, 2^120143506 is an apocalyptic number.

120143506 is a deficient number, since it is larger than the sum of its proper divisors (89641454).

120143506 is a wasteful number, since it uses less digits than its factorization.

120143506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 120143506 is about 10960.9993157558. Note that the first 3 decimals coincide. The cubic root of 120143506 is about 493.4389566676.

Adding to 120143506 its reverse (605341021), we get a palindrome (725484527).

The spelling of 120143506 in words is "one hundred twenty million, one hundred forty-three thousand, five hundred six".