71247263 has 4 divisors (see below), whose sum is σ = 71939088. Its totient is φ = 70555440.

The previous prime is 71247257. The next prime is 71247277. The reversal of 71247263 is 36274217.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71247263 - 2⁶ = 71247199 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 (71247203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345758 + ... + 345963.

It is an arithmetic number, because the mean of its divisors is an integer number (17984772).

Almost surely, 2^71247263 is an apocalyptic number.

71247263 is a deficient number, since it is larger than the sum of its proper divisors (691825).

71247263 is a wasteful number, since it uses less digits than its factorization.

71247263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691824.

The product of its digits is 14112, while the sum is 32.

The square root of 71247263 is about 8440.8093806222. The cubic root of 71247263 is about 414.5619086246.

The spelling of 71247263 in words is "seventy-one million, two hundred forty-seven thousand, two hundred sixty-three".