71736242 has 18 divisors (see below), whose sum is σ = 110652087. Its totient is φ = 34879936.

The previous prime is 71736239. The next prime is 71736299. The reversal of 71736242 is 24263717.

It can be written as a sum of positive squares in 5 ways, for example, as 8994001 + 62742241 = 2999^2 + 7921^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5989.

It is a Duffinian number.

Its product of digits (14112) is a multiple of the sum of its prime divisors (168).

It is a junction number, because it is equal to n+sod(n) for n = 71736199 and 71736208.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 634778 + ... + 634890.

Almost surely, 2^71736242 is an apocalyptic number.

71736242 is a deficient number, since it is larger than the sum of its proper divisors (38915845).

71736242 is an equidigital number, since it uses as much as digits as its factorization.

71736242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 168 counting only the distinct ones).

The product of its digits is 14112, while the sum is 32.

The square root of 71736242 is about 8469.7250250525. The cubic root of 71736242 is about 415.5081441848.

Multiplying 71736242 by its sum of digits (32), we get a square (2295559744 = 47912²).

Multiplying 71736242 by its product of digits (14112), we get a square (1012341847104 = 1006152²).

Adding to 71736242 its reverse (24263717), we get a palindrome (95999959).

The spelling of 71736242 in words is "seventy-one million, seven hundred thirty-six thousand, two hundred forty-two".