71007140 has 12 divisors (see below), whose sum is σ = 149115036. Its totient is φ = 28402848.

The previous prime is 71007127. The next prime is 71007151. The reversal of 71007140 is 4170017.

It can be written as a sum of positive squares in 2 ways, for example, as 22202944 + 48804196 = 4712^2 + 6986^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 3550357 = 71007140 / (7 + 1 + 0 + 0 + 7 + 1 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1775159 + ... + 1775198.

It is an arithmetic number, because the mean of its divisors is an integer number (12426253).

Almost surely, 2^71007140 is an apocalyptic number.

It is an amenable number.

71007140 is an abundant number, since it is smaller than the sum of its proper divisors (78107896).

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

71007140 is a wasteful number, since it uses less digits than its factorization.

71007140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550366 (or 3550364 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 71007140 is about 8426.5734435772. The cubic root of 71007140 is about 414.0956549647.

Adding to 71007140 its reverse (4170017), we get a palindrome (75177157).

The spelling of 71007140 in words is "seventy-one million, seven thousand, one hundred forty".