201405145 has 8 divisors (see below), whose sum is σ = 250020360. Its totient is φ = 155568000.

The previous prime is 201405143. The next prime is 201405151. The reversal of 201405145 is 541504102.

It can be written as a sum of positive squares in 4 ways, for example, as 41332041 + 160073104 = 6429^2 + 12652^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201405145 - 2¹ = 201405143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201405143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694356 + ... + 694645.

It is an arithmetic number, because the mean of its divisors is an integer number (31252545).

Almost surely, 2^201405145 is an apocalyptic number.

It is an amenable number.

201405145 is a deficient number, since it is larger than the sum of its proper divisors (48615215).

201405145 is a wasteful number, since it uses less digits than its factorization.

201405145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389035.

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

The square root of 201405145 is about 14191.7280484090. The cubic root of 201405145 is about 586.1699090295.

Adding to 201405145 its reverse (541504102), we get a palindrome (742909247).

The spelling of 201405145 in words is "two hundred one million, four hundred five thousand, one hundred forty-five".