71545234 has 4 divisors (see below), whose sum is σ = 107317854. Its totient is φ = 35772616.

The previous prime is 71545223. The next prime is 71545237. The reversal of 71545234 is 43254517.

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

It can be written as a sum of positive squares in only one way, i.e., 35964009 + 35581225 = 5997^2 + 5965^2 .

It is a super-2 number, since 2×71545234² = 10237441016229512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71545196 and 71545205.

It is not an unprimeable number, because it can be changed into a prime (71545237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17886307 + ... + 17886310.

Almost surely, 2^71545234 is an apocalyptic number.

71545234 is a deficient number, since it is larger than the sum of its proper divisors (35772620).

71545234 is a wasteful number, since it uses less digits than its factorization.

71545234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35772619.

The product of its digits is 16800, while the sum is 31.

The square root of 71545234 is about 8458.4415822301. The cubic root of 71545234 is about 415.1390331083.

The spelling of 71545234 in words is "seventy-one million, five hundred forty-five thousand, two hundred thirty-four".