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8180141 = 26213121
BaseRepresentation
bin11111001101000110101101
3120101121001012
4133031012231
54043231031
6451155005
7126346544
oct37150655
916347035
108180141
114687952
1228a5a65
131905428
14112d15b
15ab8b2b
hex7cd1ad

8180141 has 4 divisors (see below), whose sum is σ = 8185884. Its totient is φ = 8174400.

The previous prime is 8180119. The next prime is 8180143. The reversal of 8180141 is 1410818.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1410818 = 2705409.

It can be written as a sum of positive squares in 2 ways, for example, as 2468041 + 5712100 = 1571^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 8180141 - 210 = 8179117 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 (8180143) 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, 1061 + ... + 4181.

It is an arithmetic number, because the mean of its divisors is an integer number (2046471).

Almost surely, 28180141 is an apocalyptic number.

It is an amenable number.

8180141 is a deficient number, since it is larger than the sum of its proper divisors (5743).

8180141 is a wasteful number, since it uses less digits than its factorization.

8180141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5742.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 8180141 is about 2860.0945788557. The cubic root of 8180141 is about 201.4900462422.

Adding to 8180141 its reverse (1410818), we get a palindrome (9590959).

The spelling of 8180141 in words is "eight million, one hundred eighty thousand, one hundred forty-one".

Divisors: 1 2621 3121 8180141