133648 has 10 divisors (see below), whose sum is σ = 258974. Its totient is φ = 66816.

The previous prime is 133633. The next prime is 133649. The reversal of 133648 is 846331.

It can be written as a sum of positive squares in only one way, i.e., 121104 + 12544 = 348^2 + 112^2 .

It is not an unprimeable number, because it can be changed into a prime (133649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4161 + ... + 4192.

2¹³³⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

133648 is a deficient number, since it is larger than the sum of its proper divisors (125326).

133648 is an equidigital number, since it uses as much as digits as its factorization.

133648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8361 (or 8355 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 133648 is about 365.5789928319. The cubic root of 133648 is about 51.1274525917.

Adding to 133648 its reverse (846331), we get a palindrome (979979).

The spelling of 133648 in words is "one hundred thirty-three thousand, six hundred forty-eight".