71445746 has 4 divisors (see below), whose sum is σ = 107168622. Its totient is φ = 35722872.

The previous prime is 71445727. The next prime is 71445767. The reversal of 71445746 is 64754417.

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., 48511225 + 22934521 = 6965^2 + 4789^2 .

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, 17861435 + ... + 17861438.

Almost surely, 2^71445746 is an apocalyptic number.

71445746 is a deficient number, since it is larger than the sum of its proper divisors (35722876).

71445746 is a wasteful number, since it uses less digits than its factorization.

71445746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35722875.

The product of its digits is 94080, while the sum is 38.

The square root of 71445746 is about 8452.5585475642. The cubic root of 71445746 is about 414.9465184867.

The spelling of 71445746 in words is "seventy-one million, four hundred forty-five thousand, seven hundred forty-six".