71102740 has 12 divisors (see below), whose sum is σ = 149315796. Its totient is φ = 28441088.

The previous prime is 71102711. The next prime is 71102741. The reversal of 71102740 is 4720117.

It can be written as a sum of positive squares in 2 ways, for example, as 11102224 + 60000516 = 3332^2 + 7746^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71102741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777549 + ... + 1777588.

It is an arithmetic number, because the mean of its divisors is an integer number (12442983).

Almost surely, 2^71102740 is an apocalyptic number.

It is an amenable number.

71102740 is an abundant number, since it is smaller than the sum of its proper divisors (78213056).

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

71102740 is a wasteful number, since it uses less digits than its factorization.

71102740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555146 (or 3555144 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 71102740 is about 8432.2440666764. The cubic root of 71102740 is about 414.2814099547.

Adding to 71102740 its reverse (4720117), we get a palindrome (75822857).

The spelling of 71102740 in words is "seventy-one million, one hundred two thousand, seven hundred forty".