133541441 has 4 divisors (see below), whose sum is σ = 145681584. Its totient is φ = 121401300.

The previous prime is 133541417. The next prime is 133541449. The reversal of 133541441 is 144145331.

It is a happy number.

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 133541441 - 2¹⁴ = 133525057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 133541441.

It is not an unprimeable number, because it can be changed into a prime (133541449) 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, 6070055 + ... + 6070076.

It is an arithmetic number, because the mean of its divisors is an integer number (36420396).

Almost surely, 2^133541441 is an apocalyptic number.

133541441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133541441 is a deficient number, since it is larger than the sum of its proper divisors (12140143).

133541441 is a wasteful number, since it uses less digits than its factorization.

133541441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12140142.

The product of its digits is 2880, while the sum is 26.

The square root of 133541441 is about 11556.0131966003. The cubic root of 133541441 is about 511.1386082123.

Adding to 133541441 its reverse (144145331), we get a palindrome (277686772).

The spelling of 133541441 in words is "one hundred thirty-three million, five hundred forty-one thousand, four hundred forty-one".