71405851 has 6 divisors (see below), whose sum is σ = 78487556. Its totient is φ = 64914300.

The previous prime is 71405849. The next prime is 71405861. The reversal of 71405851 is 15850417.

It is not a de Polignac number, because 71405851 - 2¹ = 71405849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71405821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 294945 + ... + 295186.

Almost surely, 2^71405851 is an apocalyptic number.

71405851 is a deficient number, since it is larger than the sum of its proper divisors (7081705).

71405851 is a wasteful number, since it uses less digits than its factorization.

71405851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590153 (or 590142 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 71405851 is about 8450.1982816973. The cubic root of 71405851 is about 414.8692693174.

The spelling of 71405851 in words is "seventy-one million, four hundred five thousand, eight hundred fifty-one".