133412520 has 32 divisors (see below), whose sum is σ = 400237920. Its totient is φ = 35576640.

The previous prime is 133412507. The next prime is 133412563. The reversal of 133412520 is 25214331.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 555766 + ... + 556005.

It is an arithmetic number, because the mean of its divisors is an integer number (12507435).

Almost surely, 2^133412520 is an apocalyptic number.

133412520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133412520 is an abundant number, since it is smaller than the sum of its proper divisors (266825400).

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

133412520 is a wasteful number, since it uses less digits than its factorization.

133412520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111785 (or 1111781 counting only the distinct ones).

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

The square root of 133412520 is about 11550.4337580889. The cubic root of 133412520 is about 510.9740707301.

Adding to 133412520 its reverse (25214331), we get a palindrome (158626851).

The spelling of 133412520 in words is "one hundred thirty-three million, four hundred twelve thousand, five hundred twenty".