133149 has 4 divisors (see below), whose sum is σ = 177536. Its totient is φ = 88764.

The previous prime is 133121. The next prime is 133153. The reversal of 133149 is 941331.

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 an emirpimes, since its reverse is a distinct semiprime: 941331 = 3 ⋅313777.

It is not a de Polignac number, because 133149 - 2⁵ = 133117 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22189 + ... + 22194.

It is an arithmetic number, because the mean of its divisors is an integer number (44384).

2¹³³¹⁴⁹ is an apocalyptic number.

It is an amenable number.

133149 is a deficient number, since it is larger than the sum of its proper divisors (44387).

133149 is an equidigital number, since it uses as much as digits as its factorization.

133149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44386.

The product of its digits is 324, while the sum is 21.

The square root of 133149 is about 364.8958755590. The cubic root of 133149 is about 51.0637419066.

It can be divided in two parts, 133 and 149, that added together give a palindrome (282).

The spelling of 133149 in words is "one hundred thirty-three thousand, one hundred forty-nine".