71970855 has 32 divisors (see below), whose sum is σ = 127768320. Its totient is φ = 34298880.

The previous prime is 71970851. The next prime is 71970869. The reversal of 71970855 is 55807917.

It is not a de Polignac number, because 71970855 - 2² = 71970851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71970851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6039 + ... + 13431.

It is an arithmetic number, because the mean of its divisors is an integer number (3992760).

Almost surely, 2^71970855 is an apocalyptic number.

71970855 is a deficient number, since it is larger than the sum of its proper divisors (55797465).

71970855 is a wasteful number, since it uses less digits than its factorization.

71970855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7471.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 71970855 is about 8483.5638148127. The cubic root of 71970855 is about 415.9606236614.

The spelling of 71970855 in words is "seventy-one million, nine hundred seventy thousand, eight hundred fifty-five".