133402241 has 4 divisors (see below), whose sum is σ = 152459712. Its totient is φ = 114344772.

The previous prime is 133402229. The next prime is 133402253. The reversal of 133402241 is 142204331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 142204331 = 23 ⋅6182797.

It is an interprime number because it is at equal distance from previous prime (133402229) and next prime (133402253).

It is a cyclic number.

It is not a de Polignac number, because 133402241 - 2⁶ = 133402177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133402261) 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, 9528725 + ... + 9528738.

It is an arithmetic number, because the mean of its divisors is an integer number (38114928).

Almost surely, 2^133402241 is an apocalyptic number.

It is an amenable number.

133402241 is a deficient number, since it is larger than the sum of its proper divisors (19057471).

133402241 is an equidigital number, since it uses as much as digits as its factorization.

133402241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19057470.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 133402241 is about 11549.9887878733. The cubic root of 133402241 is about 510.9609474306.

Adding to 133402241 its reverse (142204331), we get a palindrome (275606572).

The spelling of 133402241 in words is "one hundred thirty-three million, four hundred two thousand, two hundred forty-one".