71430865 has 16 divisors (see below), whose sum is σ = 94795776. Its totient is φ = 51235200.

The previous prime is 71430811. The next prime is 71430883. The reversal of 71430865 is 56803417.

It is not a de Polignac number, because 71430865 - 2²¹ = 69333713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71430865.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4881 + ... + 12910.

It is an arithmetic number, because the mean of its divisors is an integer number (5924736).

Almost surely, 2^71430865 is an apocalyptic number.

It is an amenable number.

71430865 is a deficient number, since it is larger than the sum of its proper divisors (23364911).

71430865 is a wasteful number, since it uses less digits than its factorization.

71430865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17880.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 71430865 is about 8451.6782357115. The cubic root of 71430865 is about 414.9177075906.

The spelling of 71430865 in words is "seventy-one million, four hundred thirty thousand, eight hundred sixty-five".