71301240 has 96 divisors (see below), whose sum is σ = 239241600. Its totient is φ = 18397440.

The previous prime is 71301203. The next prime is 71301277. The reversal of 71301240 is 4210317.

It is an interprime number because it is at equal distance from previous prime (71301203) and next prime (71301277).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7966 + ... + 14354.

It is an arithmetic number, because the mean of its divisors is an integer number (2492100).

Almost surely, 2^71301240 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 71301240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119620800).

71301240 is an abundant number, since it is smaller than the sum of its proper divisors (167940360).

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

71301240 is a wasteful number, since it uses less digits than its factorization.

71301240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437 (or 6430 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 71301240 is about 8444.0061582166. The cubic root of 71301240 is about 414.6665730411. Note that the first 3 decimals are identical.

Adding to 71301240 its reverse (4210317), we get a palindrome (75511557).

The spelling of 71301240 in words is "seventy-one million, three hundred one thousand, two hundred forty".