71020312 has 32 divisors (see below), whose sum is σ = 145612800. Its totient is φ = 32205600.

The previous prime is 71020303. The next prime is 71020321. The reversal of 71020312 is 21302017.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71020303) and next prime (71020321).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54889 + ... + 56167.

It is an arithmetic number, because the mean of its divisors is an integer number (4550400).

Almost surely, 2^71020312 is an apocalyptic number.

It is an amenable number.

71020312 is an abundant number, since it is smaller than the sum of its proper divisors (74592488).

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

71020312 is a wasteful number, since it uses less digits than its factorization.

71020312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927 (or 1923 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 71020312 is about 8427.3549824367. The cubic root of 71020312 is about 414.1212586375.

Adding to 71020312 its reverse (21302017), we get a palindrome (92322329).

The spelling of 71020312 in words is "seventy-one million, twenty thousand, three hundred twelve".