71478281 has 8 divisors (see below), whose sum is σ = 84324864. Its totient is φ = 59290560.

The previous prime is 71478269. The next prime is 71478283. The reversal of 71478281 is 18287417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-71478281 is a prime.

It is a super-2 number, since 2×71478281² = 10218289309429922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71478283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164480 + ... + 164913.

It is an arithmetic number, because the mean of its divisors is an integer number (10540608).

Almost surely, 2^71478281 is an apocalyptic number.

It is an amenable number.

71478281 is a deficient number, since it is larger than the sum of its proper divisors (12846583).

71478281 is a wasteful number, since it uses less digits than its factorization.

71478281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329431.

The product of its digits is 25088, while the sum is 38.

The square root of 71478281 is about 8454.4828937079. The cubic root of 71478281 is about 415.0094951135.

The spelling of 71478281 in words is "seventy-one million, four hundred seventy-eight thousand, two hundred eighty-one".