133455121 has 2 divisors, whose sum is σ = 133455122. Its totient is φ = 133455120.

The previous prime is 133455097. The next prime is 133455139. The reversal of 133455121 is 121554331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119683600 + 13771521 = 10940^2 + 3711^2 .

It is a cyclic number.

It is not a de Polignac number, because 133455121 - 2⁹ = 133454609 is a prime.

It is a super-2 number, since 2×133455121² = 35620538642249282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133453121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66727560 + 66727561.

It is an arithmetic number, because the mean of its divisors is an integer number (66727561).

Almost surely, 2^133455121 is an apocalyptic number.

It is an amenable number.

133455121 is a deficient number, since it is larger than the sum of its proper divisors (1).

133455121 is an equidigital number, since it uses as much as digits as its factorization.

133455121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 133455121 is about 11552.2777407748. The cubic root of 133455121 is about 511.0284526572.

The spelling of 133455121 in words is "one hundred thirty-three million, four hundred fifty-five thousand, one hundred twenty-one".