71123506 has 4 divisors (see below), whose sum is σ = 106685262. Its totient is φ = 35561752.

The previous prime is 71123491. The next prime is 71123531. The reversal of 71123506 is 60532117.

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., 50339025 + 20784481 = 7095^2 + 4559^2 .

It is an unprimeable number.

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, 17780875 + ... + 17780878.

Almost surely, 2^71123506 is an apocalyptic number.

71123506 is a deficient number, since it is larger than the sum of its proper divisors (35561756).

71123506 is a wasteful number, since it uses less digits than its factorization.

71123506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35561755.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 71123506 is about 8433.4753215979. The cubic root of 71123506 is about 414.3217371881.

The spelling of 71123506 in words is "seventy-one million, one hundred twenty-three thousand, five hundred six".