71431745 has 48 divisors (see below), whose sum is σ = 109396224. Its totient is φ = 43824000.

The previous prime is 71431693. The next prime is 71431769. The reversal of 71431745 is 54713417.

It is not a de Polignac number, because 71431745 - 2¹⁴ = 71415361 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 427652 + ... + 427818.

It is an arithmetic number, because the mean of its divisors is an integer number (2279088).

Almost surely, 2^71431745 is an apocalyptic number.

It is an amenable number.

71431745 is a deficient number, since it is larger than the sum of its proper divisors (37964479).

71431745 is a wasteful number, since it uses less digits than its factorization.

71431745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 291 counting only the distinct ones).

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

The square root of 71431745 is about 8451.7302962175. The cubic root of 71431745 is about 414.9194114576.

It can be divided in two parts, 7143 and 1745, that added together give a palindrome (8888).

The spelling of 71431745 in words is "seventy-one million, four hundred thirty-one thousand, seven hundred forty-five".