284172145 has 4 divisors (see below), whose sum is σ = 341006580. Its totient is φ = 227337712.

The previous prime is 284172103. The next prime is 284172157. The reversal of 284172145 is 541271482.

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 37933281 + 246238864 = 6159^2 + 15692^2 .

It is a cyclic number.

It is not a de Polignac number, because 284172145 - 2⁹ = 284171633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 284172145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28417210 + ... + 28417219.

It is an arithmetic number, because the mean of its divisors is an integer number (85251645).

Almost surely, 2^284172145 is an apocalyptic number.

It is an amenable number.

284172145 is a deficient number, since it is larger than the sum of its proper divisors (56834435).

284172145 is an equidigital number, since it uses as much as digits as its factorization.

284172145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56834434.

The product of its digits is 17920, while the sum is 34.

The square root of 284172145 is about 16857.4062358359. The cubic root of 284172145 is about 657.4466273475.

The spelling of 284172145 in words is "two hundred eighty-four million, one hundred seventy-two thousand, one hundred forty-five".