133442401 has 4 divisors (see below), whose sum is σ = 141291972. Its totient is φ = 125592832.

The previous prime is 133442399. The next prime is 133442411. The reversal of 133442401 is 104244331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104244331 = 883 ⋅118057.

It can be written as a sum of positive squares in 2 ways, for example, as 119574225 + 13868176 = 10935^2 + 3724^2 .

It is a cyclic number.

It is not a de Polignac number, because 133442401 - 2¹ = 133442399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133442411) 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, 3924760 + ... + 3924793.

It is an arithmetic number, because the mean of its divisors is an integer number (35322993).

Almost surely, 2^133442401 is an apocalyptic number.

It is an amenable number.

133442401 is a deficient number, since it is larger than the sum of its proper divisors (7849571).

133442401 is an equidigital number, since it uses as much as digits as its factorization.

133442401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849570.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 133442401 is about 11551.7271868756. The cubic root of 133442401 is about 511.0122162666.

Adding to 133442401 its reverse (104244331), we get a palindrome (237686732).

The spelling of 133442401 in words is "one hundred thirty-three million, four hundred forty-two thousand, four hundred one".