• 141 can be written using four 4's:

141 has 4 divisors (see below), whose sum is σ = 192. Its totient is φ = 92.

The previous prime is 139. The next prime is 149.

141 is nontrivially palindromic in base 6 and base 10.

141 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

141 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 141 - 2^{1} = 139 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

141 is an undulating number in base 6 and base 10.

141 is strictly pandigital in base 4.

It is a Curzon number.

141 is a lucky number.

It is a plaindrome in base 9, base 11, base 13 and base 16.

It is a nialpdrome in base 12, base 14 and base 15.

It is a congruent number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21 + ... + 26.

It is an arithmetic number, because the mean of its divisors is an integer number (48).

141 is the 8-th centered pentagonal number.

It is an amenable number.

141 is a deficient number, since it is larger than the sum of its proper divisors (51).

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

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

The sum of its prime factors is 50.

The product of its digits is 4, while the sum is 6.

The square root of 141 is about 11.8743420870. The cubic root of 141 is about 5.2048278634.

It can be divided in two parts, 14 and 1, that added together give a triangular number (15 = T_{5}).

The spelling of 141 in words is "one hundred forty-one", and thus it is an aban number and an iban number.

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