145140205 has 24 divisors (see below), whose sum is σ = 207559800. Its totient is φ = 97090560.

The previous prime is 145140199. The next prime is 145140209. The reversal of 145140205 is 502041541.

It can be written as a sum of positive squares in 4 ways, for example, as 19386409 + 125753796 = 4403^2 + 11214^2 .

It is not a de Polignac number, because 145140205 - 2³ = 145140197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145140209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2821 + ... + 17269.

It is an arithmetic number, because the mean of its divisors is an integer number (8648325).

Almost surely, 2^145140205 is an apocalyptic number.

It is an amenable number.

145140205 is a deficient number, since it is larger than the sum of its proper divisors (62419595).

145140205 is a wasteful number, since it uses less digits than its factorization.

145140205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14509 (or 14502 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 145140205 is about 12047.4148679291. The cubic root of 145140205 is about 525.5280612741.

Adding to 145140205 its reverse (502041541), we get a palindrome (647181746).

The spelling of 145140205 in words is "one hundred forty-five million, one hundred forty thousand, two hundred five".