133647252 has 12 divisors (see below), whose sum is σ = 311843616. Its totient is φ = 44549080.

The previous prime is 133647233. The next prime is 133647259. The reversal of 133647252 is 252746331.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133647259) 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 in 3 ways as a sum of consecutive naturals, for example, 5568624 + ... + 5568647.

It is an arithmetic number, because the mean of its divisors is an integer number (25986968).

Almost surely, 2^133647252 is an apocalyptic number.

133647252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133647252 is an abundant number, since it is smaller than the sum of its proper divisors (178196364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133647252 is a wasteful number, since it uses less digits than its factorization.

133647252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11137278 (or 11137276 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 133647252 is about 11560.5904693489. The cubic root of 133647252 is about 511.2735720824.

The spelling of 133647252 in words is "one hundred thirty-three million, six hundred forty-seven thousand, two hundred fifty-two".