133042520 has 32 divisors (see below), whose sum is σ = 322373520. Its totient is φ = 49123200.

The previous prime is 133042513. The next prime is 133042529. The reversal of 133042520 is 25240331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 133042492 and 133042501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133042529) 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, 127406 + ... + 128445.

Almost surely, 2^133042520 is an apocalyptic number.

133042520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133042520 is an abundant number, since it is smaller than the sum of its proper divisors (189331000).

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

133042520 is a wasteful number, since it uses less digits than its factorization.

133042520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255875 (or 255871 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 133042520 is about 11534.4059231501. The cubic root of 133042520 is about 510.5012628981.

Adding to 133042520 its reverse (25240331), we get a palindrome (158282851).

The spelling of 133042520 in words is "one hundred thirty-three million, forty-two thousand, five hundred twenty".