71228942 has 4 divisors (see below), whose sum is σ = 106843416. Its totient is φ = 35614470.

The previous prime is 71228909. The next prime is 71228981. The reversal of 71228942 is 24982217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24982217 = 13 ⋅1921709.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17807234 + ... + 17807237.

It is an arithmetic number, because the mean of its divisors is an integer number (26710854).

Almost surely, 2^71228942 is an apocalyptic number.

71228942 is a deficient number, since it is larger than the sum of its proper divisors (35614474).

71228942 is a wasteful number, since it uses less digits than its factorization.

71228942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35614473.

The product of its digits is 16128, while the sum is 35.

The square root of 71228942 is about 8439.7240476215. The cubic root of 71228942 is about 414.5263711666.

The spelling of 71228942 in words is "seventy-one million, two hundred twenty-eight thousand, nine hundred forty-two".