133279541 has 8 divisors (see below), whose sum is σ = 141255000. Its totient is φ = 125319168.

The previous prime is 133279537. The next prime is 133279543. The reversal of 133279541 is 145972331.

It can be written as a sum of positive squares in 4 ways, for example, as 70140625 + 63138916 = 8375^2 + 7946^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133279541 - 2² = 133279537 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133279543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18095 + ... + 24371.

It is an arithmetic number, because the mean of its divisors is an integer number (17656875).

Almost surely, 2^133279541 is an apocalyptic number.

It is an amenable number.

133279541 is a deficient number, since it is larger than the sum of its proper divisors (7975459).

133279541 is a wasteful number, since it uses less digits than its factorization.

133279541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543.

The product of its digits is 22680, while the sum is 35.

The square root of 133279541 is about 11544.6758724531. The cubic root of 133279541 is about 510.8042430671.

The spelling of 133279541 in words is "one hundred thirty-three million, two hundred seventy-nine thousand, five hundred forty-one".