133144001 has 4 divisors (see below), whose sum is σ = 140151600. Its totient is φ = 126136404.

The previous prime is 133143991. The next prime is 133144021. The reversal of 133144001 is 100441331.

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 a de Polignac number, because none of the positive numbers 2^k-133144001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133144021) 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, 3503771 + ... + 3503808.

It is an arithmetic number, because the mean of its divisors is an integer number (35037900).

Almost surely, 2^133144001 is an apocalyptic number.

It is an amenable number.

133144001 is a deficient number, since it is larger than the sum of its proper divisors (7007599).

133144001 is an equidigital number, since it uses as much as digits as its factorization.

133144001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007598.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 133144001 is about 11538.8041408111. The cubic root of 133144001 is about 510.6310284601.

Adding to 133144001 its reverse (100441331), we get a palindrome (233585332).

The spelling of 133144001 in words is "one hundred thirty-three million, one hundred forty-four thousand, one".