71180442 has 24 divisors (see below), whose sum is σ = 159543540. Its totient is φ = 22908480.

The previous prime is 71180401. The next prime is 71180449. The reversal of 71180442 is 24408117.

It can be written as a sum of positive squares in 2 ways, for example, as 66732561 + 4447881 = 8169^2 + 2109^2 .

It is not an unprimeable number, because it can be changed into a prime (71180449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67659 + ... + 68702.

Almost surely, 2^71180442 is an apocalyptic number.

71180442 is an abundant number, since it is smaller than the sum of its proper divisors (88363098).

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

71180442 is a wasteful number, since it uses less digits than its factorization.

71180442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136398 (or 136395 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 71180442 is about 8436.8502416482. The cubic root of 71180442 is about 414.4322657219.

Adding to 71180442 its reverse (24408117), we get a palindrome (95588559).

The spelling of 71180442 in words is "seventy-one million, one hundred eighty thousand, four hundred forty-two".