71213420 has 12 divisors (see below), whose sum is σ = 149548224. Its totient is φ = 28485360.

The previous prime is 71213399. The next prime is 71213437. The reversal of 71213420 is 2431217.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 3560671 = 71213420 / (7 + 1 + 2 + 1 + 3 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 71213392 and 71213401.

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 3 ways as a sum of consecutive naturals, for example, 1780316 + ... + 1780355.

It is an arithmetic number, because the mean of its divisors is an integer number (12462352).

Almost surely, 2^71213420 is an apocalyptic number.

It is an amenable number.

71213420 is an abundant number, since it is smaller than the sum of its proper divisors (78334804).

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

71213420 is a wasteful number, since it uses less digits than its factorization.

71213420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560680 (or 3560678 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 71213420 is about 8438.8044176886. The cubic root of 71213420 is about 414.4962581930.

Adding to 71213420 its reverse (2431217), we get a palindrome (73644637).

The spelling of 71213420 in words is "seventy-one million, two hundred thirteen thousand, four hundred twenty".