71775146 has 4 divisors (see below), whose sum is σ = 107662722. Its totient is φ = 35887572.

The previous prime is 71775131. The next prime is 71775149. The reversal of 71775146 is 64157717.

It is a happy number.

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., 70744921 + 1030225 = 8411^2 + 1015^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71775149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17943785 + ... + 17943788.

Almost surely, 2^71775146 is an apocalyptic number.

71775146 is a deficient number, since it is larger than the sum of its proper divisors (35887576).

71775146 is a wasteful number, since it uses less digits than its factorization.

71775146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35887575.

The product of its digits is 41160, while the sum is 38.

The square root of 71775146 is about 8472.0213644679. The cubic root of 71775146 is about 415.5832434052.

The spelling of 71775146 in words is "seventy-one million, seven hundred seventy-five thousand, one hundred forty-six".