133402261 has 2 divisors, whose sum is σ = 133402262. Its totient is φ = 133402260.

The previous prime is 133402259. The next prime is 133402267. The reversal of 133402261 is 162204331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110649361 + 22752900 = 10519^2 + 4770^2 .

It is a cyclic number.

It is not a de Polignac number, because 133402261 - 2¹ = 133402259 is a prime.

Together with 133402259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133402267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66701130 + 66701131.

It is an arithmetic number, because the mean of its divisors is an integer number (66701131).

Almost surely, 2^133402261 is an apocalyptic number.

It is an amenable number.

133402261 is a deficient number, since it is larger than the sum of its proper divisors (1).

133402261 is an equidigital number, since it uses as much as digits as its factorization.

133402261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 133402261 is about 11549.9896536750. The cubic root of 133402261 is about 510.9609729654.

Adding to 133402261 its reverse (162204331), we get a palindrome (295606592).

The spelling of 133402261 in words is "one hundred thirty-three million, four hundred two thousand, two hundred sixty-one".