71253169 has 4 divisors (see below), whose sum is σ = 76734196. Its totient is φ = 65772144.

The previous prime is 71253139. The next prime is 71253187. The reversal of 71253169 is 96135217.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38626225 + 32626944 = 6215^2 + 5712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71253169 is a prime.

It is a super-2 number, since 2×71253169² = 10154028185085122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71253109) 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, 2740494 + ... + 2740519.

It is an arithmetic number, because the mean of its divisors is an integer number (19183549).

Almost surely, 2^71253169 is an apocalyptic number.

It is an amenable number.

71253169 is a deficient number, since it is larger than the sum of its proper divisors (5481027).

71253169 is a wasteful number, since it uses less digits than its factorization.

71253169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5481026.

The product of its digits is 11340, while the sum is 34.

The square root of 71253169 is about 8441.1592213392. The cubic root of 71253169 is about 414.5733632634.

The spelling of 71253169 in words is "seventy-one million, two hundred fifty-three thousand, one hundred sixty-nine".