133142591 has 4 divisors (see below), whose sum is σ = 133407792. Its totient is φ = 132877392.

The previous prime is 133142579. The next prime is 133142593. The reversal of 133142591 is 195241331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195241331 = 4373 ⋅44647.

It is a cyclic number.

It is not a de Polignac number, because 133142591 - 2²⁶ = 66033727 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 (133142593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131846 + ... + 132851.

It is an arithmetic number, because the mean of its divisors is an integer number (33351948).

Almost surely, 2^133142591 is an apocalyptic number.

133142591 is a deficient number, since it is larger than the sum of its proper divisors (265201).

133142591 is an equidigital number, since it uses as much as digits as its factorization.

133142591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265200.

The product of its digits is 3240, while the sum is 29.

The square root of 133142591 is about 11538.7430424635. The cubic root of 133142591 is about 510.6292259198.

The spelling of 133142591 in words is "one hundred thirty-three million, one hundred forty-two thousand, five hundred ninety-one".