146220143 has 4 divisors (see below), whose sum is σ = 153915960. Its totient is φ = 138524328.

The previous prime is 146220097. The next prime is 146220199. The reversal of 146220143 is 341022641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341022641 = 283 ⋅1205027.

It is a cyclic number.

It is not a de Polignac number, because 146220143 - 2¹² = 146216047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146220443) 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, 3847880 + ... + 3847917.

It is an arithmetic number, because the mean of its divisors is an integer number (38478990).

Almost surely, 2^146220143 is an apocalyptic number.

146220143 is a deficient number, since it is larger than the sum of its proper divisors (7695817).

146220143 is an equidigital number, since it uses as much as digits as its factorization.

146220143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7695816.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 146220143 is about 12092.1521244152. The cubic root of 146220143 is about 526.8282658962.

Adding to 146220143 its reverse (341022641), we get a palindrome (487242784).

The spelling of 146220143 in words is "one hundred forty-six million, two hundred twenty thousand, one hundred forty-three".