71214420 has 96 divisors (see below), whose sum is σ = 205873920. Its totient is φ = 18385920.

The previous prime is 71214419. The next prime is 71214427. The reversal of 71214420 is 2441217.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71214427) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 310866 + ... + 311094.

It is an arithmetic number, because the mean of its divisors is an integer number (2144520).

Almost surely, 2^71214420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71214420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102936960).

71214420 is an abundant number, since it is smaller than the sum of its proper divisors (134659500).

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

71214420 is a wasteful number, since it uses less digits than its factorization.

71214420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 71214420 is about 8438.8636675799. The cubic root of 71214420 is about 414.4981983437.

Adding to 71214420 its reverse (2441217), we get a palindrome (73655637).

The spelling of 71214420 in words is "seventy-one million, two hundred fourteen thousand, four hundred twenty".