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381226 = 2190613
BaseRepresentation
bin1011101000100101010
3201100221111
41131010222
544144401
612100534
73145306
oct1350452
9640844
10381226
1124046a
1216474a
131046a1
149cd06
1577e51
hex5d12a

381226 has 4 divisors (see below), whose sum is σ = 571842. Its totient is φ = 190612.

The previous prime is 381223. The next prime is 381233. The reversal of 381226 is 622183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622183 = 1736599.

It can be written as a sum of positive squares in only one way, i.e., 319225 + 62001 = 565^2 + 249^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 381197 and 381206.

It is not an unprimeable number, because it can be changed into a prime (381221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95305 + ... + 95308.

2381226 is an apocalyptic number.

381226 is the 391-st centered pentagonal number.

381226 is a deficient number, since it is larger than the sum of its proper divisors (190616).

381226 is a wasteful number, since it uses less digits than its factorization.

381226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190615.

The product of its digits is 576, while the sum is 22.

The square root of 381226 is about 617.4350168236. The cubic root of 381226 is about 72.5093765122.

The spelling of 381226 in words is "three hundred eighty-one thousand, two hundred twenty-six".

Divisors: 1 2 190613 381226