71481420 has 96 divisors (see below), whose sum is σ = 234124800. Its totient is φ = 18055872.

The previous prime is 71481419. The next prime is 71481461. The reversal of 71481420 is 2418417.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6777 + ... + 13743.

It is an arithmetic number, because the mean of its divisors is an integer number (2438800).

Almost surely, 2^71481420 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 71481420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117062400).

71481420 is an abundant number, since it is smaller than the sum of its proper divisors (162643380).

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

71481420 is a wasteful number, since it uses less digits than its factorization.

71481420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004 (or 6996 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 71481420 is about 8454.6685328285. The cubic root of 71481420 is about 415.0155701324.

Adding to 71481420 its reverse (2418417), we get a palindrome (73899837).

The spelling of 71481420 in words is "seventy-one million, four hundred eighty-one thousand, four hundred twenty".