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144806141 = 254956809
BaseRepresentation
bin10001010000110…
…01000011111101
3101002110220200102
420220121003331
5244032244031
622211410445
73405555224
oct1050310375
9332426612
10144806141
1174814aa7
12405b3a25
1324000b0c
1415335cbb
15caa57cb
hex8a190fd

144806141 has 4 divisors (see below), whose sum is σ = 144865500. Its totient is φ = 144746784.

The previous prime is 144806113. The next prime is 144806143. The reversal of 144806141 is 141608441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 141608441 = 1310892957.

It can be written as a sum of positive squares in 2 ways, for example, as 55428025 + 89378116 = 7445^2 + 9454^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-144806141 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 (144806143) 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 3 ways as a sum of consecutive naturals, for example, 25856 + ... + 30953.

It is an arithmetic number, because the mean of its divisors is an integer number (36216375).

Almost surely, 2144806141 is an apocalyptic number.

It is an amenable number.

144806141 is a deficient number, since it is larger than the sum of its proper divisors (59359).

144806141 is an equidigital number, since it uses as much as digits as its factorization.

144806141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59358.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 144806141 is about 12033.5423296717. The cubic root of 144806141 is about 525.1245551789.

The spelling of 144806141 in words is "one hundred forty-four million, eight hundred six thousand, one hundred forty-one".

Divisors: 1 2549 56809 144806141