145212201 has 24 divisors (see below), whose sum is σ = 217135464. Its totient is φ = 93450240.

The previous prime is 145212173. The next prime is 145212211. The reversal of 145212201 is 102212541.

145212201 is a `hidden beast` number, since 1 + 452 + 12 + 201 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1212201 + 144000000 = 1101^2 + 12000^2 .

It is not a de Polignac number, because 145212201 - 2²³ = 136823593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33765 + ... + 37821.

It is an arithmetic number, because the mean of its divisors is an integer number (9047311).

Almost surely, 2^145212201 is an apocalyptic number.

It is an amenable number.

145212201 is a deficient number, since it is larger than the sum of its proper divisors (71923263).

145212201 is a wasteful number, since it uses less digits than its factorization.

145212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4201 (or 4198 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 145212201 is about 12050.4025243973. The cubic root of 145212201 is about 525.6149420111.

Adding to 145212201 its reverse (102212541), we get a palindrome (247424742).

The spelling of 145212201 in words is "one hundred forty-five million, two hundred twelve thousand, two hundred one".