71425540 has 48 divisors (see below), whose sum is σ = 155054592. Its totient is φ = 27616896.

The previous prime is 71425513. The next prime is 71425547. The reversal of 71425540 is 4552417.

It is a junction number, because it is equal to n+sod(n) for n = 71425499 and 71425508.

It is not an unprimeable number, because it can be changed into a prime (71425547) 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, 194437 + ... + 194803.

It is an arithmetic number, because the mean of its divisors is an integer number (3230304).

Almost surely, 2^71425540 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 71425540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77527296).

71425540 is an abundant number, since it is smaller than the sum of its proper divisors (83629052).

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

71425540 is a wasteful number, since it uses less digits than its factorization.

71425540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 71425540 is about 8451.3632036495. The cubic root of 71425540 is about 414.9073969604.

Adding to 71425540 its reverse (4552417), we get a palindrome (75977957).

The spelling of 71425540 in words is "seventy-one million, four hundred twenty-five thousand, five hundred forty".