133810 has 8 divisors (see below), whose sum is σ = 240876. Its totient is φ = 53520.

The previous prime is 133801. The next prime is 133811. The reversal of 133810 is 18331.

It can be written as a sum of positive squares in 2 ways, for example, as 123201 + 10609 = 351^2 + 103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×133810² = 35810232200, which contains 22 as substring.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (133811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6681 + ... + 6700.

2¹³³⁸¹⁰ is an apocalyptic number.

133810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133810 is a deficient number, since it is larger than the sum of its proper divisors (107066).

133810 is a wasteful number, since it uses less digits than its factorization.

133810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13388.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 133810 is about 365.8004920718. The cubic root of 133810 is about 51.1481021163.

The spelling of 133810 in words is "one hundred thirty-three thousand, eight hundred ten".