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133141 = 211631

133141 has 4 divisors (see below), whose sum is σ = 133984. Its totient is φ = 132300.

The previous prime is 133121. The next prime is 133153. The reversal of 133141 is 141331.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 141331 = 791789.

It is a 3-Lehmer number, since φ(133141) divides (133141-1)3.

It is a cyclic number.

It is not a de Polignac number, because 133141 - 25 = 133109 is a prime.

It is a Duffinian number.

133141 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105 + ... + 526.

It is an arithmetic number, because the mean of its divisors is an integer number (33496).

2133141 is an apocalyptic number.

133141 is the 211-st octagonal number.

It is an amenable number.

133141 is a deficient number, since it is larger than the sum of its proper divisors (843).

133141 is an equidigital number, since it uses as much as digits as its factorization.

133141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its digits is 36, while the sum is 13.

The square root of 133141 is about 364.8849133631. The cubic root of 133141 is about 51.0627191974.

Adding to 133141 its reverse (141331), we get a palindrome (274472).

The spelling of 133141 in words is "one hundred thirty-three thousand, one hundred forty-one".

Divisors: 1 211 631 133141