133401001 has 4 divisors (see below), whose sum is σ = 133592004. Its totient is φ = 133210000.

The previous prime is 133400987. The next prime is 133401019. The reversal of 133401001 is 100104331.

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 98307225 + 35093776 = 9915^2 + 5924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133401001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133401031) 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, 94450 + ... + 95851.

It is an arithmetic number, because the mean of its divisors is an integer number (33398001).

Almost surely, 2^133401001 is an apocalyptic number.

It is an amenable number.

133401001 is a deficient number, since it is larger than the sum of its proper divisors (191003).

133401001 is an equidigital number, since it uses as much as digits as its factorization.

133401001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191002.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 133401001 is about 11549.9351080428. The cubic root of 133401001 is about 510.9593642649.

Adding to 133401001 its reverse (100104331), we get a palindrome (233505332).

It can be divided in two parts, 13340 and 1001, that added together give a palindrome (14341).

The spelling of 133401001 in words is "one hundred thirty-three million, four hundred one thousand, one".