133540129 has 4 divisors (see below), whose sum is σ = 133578900. Its totient is φ = 133501360.

The previous prime is 133540103. The next prime is 133540177. The reversal of 133540129 is 921045331.

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 58752225 + 74787904 = 7665^2 + 8648^2 .

It is a cyclic number.

It is not a de Polignac number, because 133540129 - 2⁹ = 133539617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133540097 and 133540106.

It is not an unprimeable number, because it can be changed into a prime (133541129) 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, 13654 + ... + 21295.

It is an arithmetic number, because the mean of its divisors is an integer number (33394725).

Almost surely, 2^133540129 is an apocalyptic number.

It is an amenable number.

133540129 is a deficient number, since it is larger than the sum of its proper divisors (38771).

133540129 is an equidigital number, since it uses as much as digits as its factorization.

133540129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38770.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 133540129 is about 11555.9564294783. The cubic root of 133540129 is about 511.1369342848.

The spelling of 133540129 in words is "one hundred thirty-three million, five hundred forty thousand, one hundred twenty-nine".