71205270 has 32 divisors (see below), whose sum is σ = 171624960. Its totient is φ = 18906720.

The previous prime is 71205269. The next prime is 71205287. The reversal of 71205270 is 7250217.

It is a self number, because there is not a number n which added to its sum of digits gives 71205270.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2205 + ... + 12135.

It is an arithmetic number, because the mean of its divisors is an integer number (5363280).

Almost surely, 2^71205270 is an apocalyptic number.

71205270 is an abundant number, since it is smaller than the sum of its proper divisors (100419690).

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

71205270 is a wasteful number, since it uses less digits than its factorization.

71205270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10180.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 71205270 is about 8438.3215155622. The cubic root of 71205270 is about 414.4804452868.

Adding to 71205270 its reverse (7250217), we get a palindrome (78455487).

The spelling of 71205270 in words is "seventy-one million, two hundred five thousand, two hundred seventy".