71284955 has 12 divisors (see below), whose sum is σ = 99508320. Its totient is φ = 48880944.

The previous prime is 71284951. The next prime is 71284963. The reversal of 71284955 is 55948217.

It is not a de Polignac number, because 71284955 - 2² = 71284951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71284951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145235 + ... + 145724.

It is an arithmetic number, because the mean of its divisors is an integer number (8292360).

Almost surely, 2^71284955 is an apocalyptic number.

71284955 is a deficient number, since it is larger than the sum of its proper divisors (28223365).

71284955 is a wasteful number, since it uses less digits than its factorization.

71284955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290978 (or 290971 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 71284955 is about 8443.0418096797. The cubic root of 71284955 is about 414.6350010829.

The spelling of 71284955 in words is "seventy-one million, two hundred eighty-four thousand, nine hundred fifty-five".