71151420 has 96 divisors (see below), whose sum is σ = 212502528. Its totient is φ = 17746432.

The previous prime is 71151403. The next prime is 71151427. The reversal of 71151420 is 2415117.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71151427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64312 + ... + 65408.

It is an arithmetic number, because the mean of its divisors is an integer number (2213568).

Almost surely, 2^71151420 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 71151420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106251264).

71151420 is an abundant number, since it is smaller than the sum of its proper divisors (141351108).

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

71151420 is a wasteful number, since it uses less digits than its factorization.

71151420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 71151420 is about 8435.1301116225. The cubic root of 71151420 is about 414.3759333553.

Adding to 71151420 its reverse (2415117), we get a palindrome (73566537).

The spelling of 71151420 in words is "seventy-one million, one hundred fifty-one thousand, four hundred twenty".