71415620 has 12 divisors (see below), whose sum is σ = 149972844. Its totient is φ = 28566240.

The previous prime is 71415593. The next prime is 71415637. The reversal of 71415620 is 2651417.

It can be written as a sum of positive squares in 2 ways, for example, as 15225604 + 56190016 = 3902^2 + 7496^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71415620.

It is an unprimeable number.

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, 1785371 + ... + 1785410.

It is an arithmetic number, because the mean of its divisors is an integer number (12497737).

Almost surely, 2^71415620 is an apocalyptic number.

It is an amenable number.

71415620 is an abundant number, since it is smaller than the sum of its proper divisors (78557224).

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

71415620 is a wasteful number, since it uses less digits than its factorization.

71415620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570790 (or 3570788 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 71415620 is about 8450.7762957021. The cubic root of 71415620 is about 414.8881878095. Note that the first 3 decimals are identical.

The spelling of 71415620 in words is "seventy-one million, four hundred fifteen thousand, six hundred twenty".