71242533 has 12 divisors (see below), whose sum is σ = 108322240. Its totient is φ = 44995176.

The previous prime is 71242519. The next prime is 71242601. The reversal of 71242533 is 33524217.

71242533 is a `hidden beast` number, since 7 + 124 + 2 + 533 = 666.

It is not a de Polignac number, because 71242533 - 2⁴ = 71242517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71242497 and 71242506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71242333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208141 + ... + 208482.

Almost surely, 2^71242533 is an apocalyptic number.

It is an amenable number.

71242533 is a deficient number, since it is larger than the sum of its proper divisors (37079707).

71242533 is a wasteful number, since it uses less digits than its factorization.

71242533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416648 (or 416645 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 71242533 is about 8440.5291895710. The cubic root of 71242533 is about 414.5527343718.

The spelling of 71242533 in words is "seventy-one million, two hundred forty-two thousand, five hundred thirty-three".