71245544 has 8 divisors (see below), whose sum is σ = 133585410. Its totient is φ = 35622768.

The previous prime is 71245523. The next prime is 71245549. The reversal of 71245544 is 44554217.

It can be written as a sum of positive squares in only one way, i.e., 69923044 + 1322500 = 8362^2 + 1150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 71245544.

It is not an unprimeable number, because it can be changed into a prime (71245549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4452839 + ... + 4452854.

Almost surely, 2^71245544 is an apocalyptic number.

It is an amenable number.

71245544 is a deficient number, since it is larger than the sum of its proper divisors (62339866).

71245544 is a wasteful number, since it uses less digits than its factorization.

71245544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8905699 (or 8905695 counting only the distinct ones).

The product of its digits is 22400, while the sum is 32.

The square root of 71245544 is about 8440.7075532801. The cubic root of 71245544 is about 414.5585745192.

The spelling of 71245544 in words is "seventy-one million, two hundred forty-five thousand, five hundred forty-four".