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301243141 = 1971529153
BaseRepresentation
bin10001111101001…
…001101100000101
3202222211201220101
4101331021230011
51104104240031
645520404101
710315344613
oct2175115405
9688751811
10301243141
11145053481
1284a76631
134a5448a4
142c0186b3
151b6a7361
hex11f49b05

301243141 has 4 divisors (see below), whose sum is σ = 302772492. Its totient is φ = 299713792.

The previous prime is 301243139. The next prime is 301243169. The reversal of 301243141 is 141342103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 141342103 = 720191729.

It can be written as a sum of positive squares in 2 ways, for example, as 157602916 + 143640225 = 12554^2 + 11985^2 .

It is a cyclic number.

It is not a de Polignac number, because 301243141 - 21 = 301243139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (301243171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764380 + ... + 764773.

It is an arithmetic number, because the mean of its divisors is an integer number (75693123).

Almost surely, 2301243141 is an apocalyptic number.

It is an amenable number.

301243141 is a deficient number, since it is larger than the sum of its proper divisors (1529351).

301243141 is a wasteful number, since it uses less digits than its factorization.

301243141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529350.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 301243141 is about 17356.3573655304. The cubic root of 301243141 is about 670.3563419661.

Adding to 301243141 its reverse (141342103), we get a palindrome (442585244).

The spelling of 301243141 in words is "three hundred one million, two hundred forty-three thousand, one hundred forty-one".

Divisors: 1 197 1529153 301243141