71345144 has 16 divisors (see below), whose sum is σ = 144062520. Its totient is φ = 32928480.

The previous prime is 71345143. The next prime is 71345161. The reversal of 71345144 is 44154317.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71345143) 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 3 ways as a sum of consecutive naturals, for example, 342902 + ... + 343109.

Almost surely, 2^71345144 is an apocalyptic number.

It is an amenable number.

71345144 is an abundant number, since it is smaller than the sum of its proper divisors (72717376).

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

71345144 is a wasteful number, since it uses less digits than its factorization.

71345144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686030 (or 686026 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 71345144 is about 8446.6054720225. The cubic root of 71345144 is about 414.7516663990.

The spelling of 71345144 in words is "seventy-one million, three hundred forty-five thousand, one hundred forty-four".