71221276 has 12 divisors (see below), whose sum is σ = 142442608. Its totient is φ = 30523392.

The previous prime is 71221259. The next prime is 71221277. The reversal of 71221276 is 67212217.

71221276 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 2543617 = 71221276 / (7 + 1 + 2 + 2 + 1 + 2 + 7 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71221277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271781 + ... + 1271836.

Almost surely, 2^71221276 is an apocalyptic number.

It is an amenable number.

71221276 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71221276 is a wasteful number, since it uses less digits than its factorization.

71221276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543628 (or 2543626 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 71221276 is about 8439.2698736324. The cubic root of 71221276 is about 414.5114995284.

The spelling of 71221276 in words is "seventy-one million, two hundred twenty-one thousand, two hundred seventy-six".