71457143 has 4 divisors (see below), whose sum is σ = 71669520. Its totient is φ = 71244768.

The previous prime is 71457109. The next prime is 71457149. The reversal of 71457143 is 34175417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34175417 = 2647 ⋅12911.

It is a cyclic number.

It is not a de Polignac number, because 71457143 - 2⁶ = 71457079 is a prime.

It is a super-2 number, since 2×71457143² = 10212246571444898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71457149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105683 + ... + 106356.

It is an arithmetic number, because the mean of its divisors is an integer number (17917380).

Almost surely, 2^71457143 is an apocalyptic number.

71457143 is a deficient number, since it is larger than the sum of its proper divisors (212377).

71457143 is a wasteful number, since it uses less digits than its factorization.

71457143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212376.

The product of its digits is 11760, while the sum is 32.

The square root of 71457143 is about 8453.2326952474. The cubic root of 71457143 is about 414.9685813540.

The spelling of 71457143 in words is "seventy-one million, four hundred fifty-seven thousand, one hundred forty-three".