71262540 has 144 divisors (see below), whose sum is σ = 231678720. Its totient is φ = 17677440.

The previous prime is 71262523. The next prime is 71262547. The reversal of 71262540 is 4526217.

It is not an unprimeable number, because it can be changed into a prime (71262547) 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 47 ways as a sum of consecutive naturals, for example, 228985 + ... + 229295.

It is an arithmetic number, because the mean of its divisors is an integer number (1608880).

Almost surely, 2^71262540 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 71262540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115839360).

71262540 is an abundant number, since it is smaller than the sum of its proper divisors (160416180).

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

71262540 is a wasteful number, since it uses less digits than its factorization.

71262540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 71262540 is about 8441.7142808792. The cubic root of 71262540 is about 414.5915369425.

Adding to 71262540 its reverse (4526217), we get a palindrome (75788757).

The spelling of 71262540 in words is "seventy-one million, two hundred sixty-two thousand, five hundred forty".