133240521 has 8 divisors (see below), whose sum is σ = 187004320. Its totient is φ = 84151872.

The previous prime is 133240519. The next prime is 133240537. The reversal of 133240521 is 125042331.

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

It is not a de Polignac number, because 133240521 - 2¹ = 133240519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133240571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168720 + ... + 1168833.

It is an arithmetic number, because the mean of its divisors is an integer number (23375540).

Almost surely, 2^133240521 is an apocalyptic number.

It is an amenable number.

133240521 is a deficient number, since it is larger than the sum of its proper divisors (53763799).

133240521 is a wasteful number, since it uses less digits than its factorization.

133240521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337575.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 133240521 is about 11542.9857922463. The cubic root of 133240521 is about 510.7543891364.

Adding to 133240521 its reverse (125042331), we get a palindrome (258282852).

The spelling of 133240521 in words is "one hundred thirty-three million, two hundred forty thousand, five hundred twenty-one".