• 147 can be written using four 4's:
147 has 6 divisors (see below), whose sum is σ = 228. Its totient is φ = 84.
The previous prime is 139. The next prime is 149. The reversal of 147 is 741.
147 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.
It is not a de Polignac number, because 147 - 23 = 139 is a prime.
It is an alternating number because its digits alternate between odd and even.
147 is strictly pandigital in base 4.
It is a straight-line number, since its digits are in arithmetic progression.
It is a plaindrome in base 8, base 10, base 11 and base 15.
It is a nialpdrome in base 7, base 13, base 14 and base 16.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18 + ... + 24.
It is an arithmetic number, because the mean of its divisors is an integer number (38).
147 is a deficient number, since it is larger than the sum of its proper divisors (81).
147 is an equidigital number, since it uses as much as digits as its factorization.
147 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 17 (or 10 counting only the distinct ones).
The product of its digits is 28, while the sum is 12.
The square root of 147 is about 12.1243556530. The cubic root of 147 is about 5.2776320879.
Multiplying 147 by its sum of digits (12), we get a square (1764 = 422).
Adding to 147 its reverse (741), we get a palindrome (888).
It can be divided in two parts, 14 and 7, that added together give a triangular number (21 = T6).
The spelling of 147 in words is "one hundred forty-seven", and thus it is an aban number and an iban number.
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