205062145 has 4 divisors (see below), whose sum is σ = 246074580. Its totient is φ = 164049712.

The previous prime is 205062133. The next prime is 205062149. The reversal of 205062145 is 541260502.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54656449 + 150405696 = 7393^2 + 12264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205062145 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205062149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20506210 + ... + 20506219.

It is an arithmetic number, because the mean of its divisors is an integer number (61518645).

It is a Proth number, since it is equal to 3129 ⋅ 2¹⁶ + 1 and 3129 < 2¹⁶.

Almost surely, 2^205062145 is an apocalyptic number.

It is an amenable number.

205062145 is a deficient number, since it is larger than the sum of its proper divisors (41012435).

205062145 is an equidigital number, since it uses as much as digits as its factorization.

205062145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41012434.

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

The square root of 205062145 is about 14319.9910963659. The cubic root of 205062145 is about 589.6964300624.

The spelling of 205062145 in words is "two hundred five million, sixty-two thousand, one hundred forty-five".