71265540 has 48 divisors (see below), whose sum is σ = 202366080. Its totient is φ = 18735360.

The previous prime is 71265533. The next prime is 71265587. The reversal of 71265540 is 4556217.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 71265498 and 71265507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4105 + ... + 12624.

It is an arithmetic number, because the mean of its divisors is an integer number (4215960).

Almost surely, 2^71265540 is an apocalyptic number.

It is an amenable number.

71265540 is an abundant number, since it is smaller than the sum of its proper divisors (131100540).

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

71265540 is a wasteful number, since it uses less digits than its factorization.

71265540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16812 (or 16810 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 71265540 is about 8441.8919680365. The cubic root of 71265540 is about 414.5973546655.

The spelling of 71265540 in words is "seventy-one million, two hundred sixty-five thousand, five hundred forty".