145205143 has 4 divisors (see below), whose sum is σ = 153746640. Its totient is φ = 136663648.

The previous prime is 145205129. The next prime is 145205161. The reversal of 145205143 is 341502541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145205143 - 2⁵ = 145205111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145205183) 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, 4270723 + ... + 4270756.

It is an arithmetic number, because the mean of its divisors is an integer number (38436660).

Almost surely, 2^145205143 is an apocalyptic number.

145205143 is a deficient number, since it is larger than the sum of its proper divisors (8541497).

145205143 is an equidigital number, since it uses as much as digits as its factorization.

145205143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541496.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 145205143 is about 12050.1096675507. The cubic root of 145205143 is about 525.6064260821.

Adding to 145205143 its reverse (341502541), we get a palindrome (486707684).

The spelling of 145205143 in words is "one hundred forty-five million, two hundred five thousand, one hundred forty-three".