133126505 has 4 divisors (see below), whose sum is σ = 159751812. Its totient is φ = 106501200.

The previous prime is 133126471. The next prime is 133126519. The reversal of 133126505 is 505621331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20830096 + 112296409 = 4564^2 + 10597^2 .

It is not a de Polignac number, because 133126505 - 2⁸ = 133126249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13312646 + ... + 13312655.

It is an arithmetic number, because the mean of its divisors is an integer number (39937953).

Almost surely, 2^133126505 is an apocalyptic number.

It is an amenable number.

133126505 is a deficient number, since it is larger than the sum of its proper divisors (26625307).

133126505 is an equidigital number, since it uses as much as digits as its factorization.

133126505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26625306.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 133126505 is about 11538.0459784142. The cubic root of 133126505 is about 510.6086607185.

Adding to 133126505 its reverse (505621331), we get a palindrome (638747836).

The spelling of 133126505 in words is "one hundred thirty-three million, one hundred twenty-six thousand, five hundred five".