71422540 has 48 divisors (see below), whose sum is σ = 172376064. Its totient is φ = 24350400.

The previous prime is 71422537. The next prime is 71422541. The reversal of 71422540 is 4522417.

It is not an unprimeable number, because it can be changed into a prime (71422541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25405 + ... + 28075.

It is an arithmetic number, because the mean of its divisors is an integer number (3591168).

Almost surely, 2^71422540 is an apocalyptic number.

71422540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71422540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86188032).

71422540 is an abundant number, since it is smaller than the sum of its proper divisors (100953524).

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

71422540 is a wasteful number, since it uses less digits than its factorization.

71422540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878 (or 2876 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 71422540 is about 8451.1857156259. The cubic root of 71422540 is about 414.9015879290.

Adding to 71422540 its reverse (4522417), we get a palindrome (75944957).

The spelling of 71422540 in words is "seventy-one million, four hundred twenty-two thousand, five hundred forty".