71304253 has 8 divisors (see below), whose sum is σ = 72044280. Its totient is φ = 70567680.

The previous prime is 71304241. The next prime is 71304257. The reversal of 71304253 is 35240317.

It can be written as a sum of positive squares in 4 ways, for example, as 710649 + 70593604 = 843^2 + 8402^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71304253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71304257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62593 + ... + 63721.

It is an arithmetic number, because the mean of its divisors is an integer number (9005535).

Almost surely, 2^71304253 is an apocalyptic number.

It is an amenable number.

71304253 is a deficient number, since it is larger than the sum of its proper divisors (740027).

71304253 is a wasteful number, since it uses less digits than its factorization.

71304253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 71304253 is about 8444.1845669076. The cubic root of 71304253 is about 414.6724138595.

The spelling of 71304253 in words is "seventy-one million, three hundred four thousand, two hundred fifty-three".