212002145 has 8 divisors (see below), whose sum is σ = 258573480. Its totient is φ = 166821120.

The previous prime is 212002129. The next prime is 212002181. The reversal of 212002145 is 541200212.

It can be written as a sum of positive squares in 4 ways, for example, as 6739216 + 205262929 = 2596^2 + 14327^2 .

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

It is not a de Polignac number, because 212002145 - 2⁴ = 212002129 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 347240 + ... + 347849.

It is an arithmetic number, because the mean of its divisors is an integer number (32321685).

Almost surely, 2^212002145 is an apocalyptic number.

It is an amenable number.

212002145 is a deficient number, since it is larger than the sum of its proper divisors (46571335).

212002145 is an equidigital number, since it uses as much as digits as its factorization.

212002145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695155.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 212002145 is about 14560.2934379771. The cubic root of 212002145 is about 596.2752067833.

Adding to 212002145 its reverse (541200212), we get a palindrome (753202357).

The spelling of 212002145 in words is "two hundred twelve million, two thousand, one hundred forty-five".