133242520 has 32 divisors (see below), whose sum is σ = 303909120. Its totient is φ = 52565760.

The previous prime is 133242511. The next prime is 133242521. The reversal of 133242520 is 25242331.

It is a junction number, because it is equal to n+sod(n) for n = 133242491 and 133242500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133242521) 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, 19896 + ... + 25735.

It is an arithmetic number, because the mean of its divisors is an integer number (9497160).

Almost surely, 2^133242520 is an apocalyptic number.

133242520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133242520 is an abundant number, since it is smaller than the sum of its proper divisors (170666600).

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

133242520 is a wasteful number, since it uses less digits than its factorization.

133242520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45715 (or 45711 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 133242520 is about 11543.0723813030. The cubic root of 133242520 is about 510.7569433967.

Adding to 133242520 its reverse (25242331), we get a palindrome (158484851).

The spelling of 133242520 in words is "one hundred thirty-three million, two hundred forty-two thousand, five hundred twenty".