71478842 has 4 divisors (see below), whose sum is σ = 107218266. Its totient is φ = 35739420.

The previous prime is 71478809. The next prime is 71478851. The reversal of 71478842 is 24887417.

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., 66275881 + 5202961 = 8141^2 + 2281^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71478842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17869709 + ... + 17869712.

Almost surely, 2^71478842 is an apocalyptic number.

71478842 is a deficient number, since it is larger than the sum of its proper divisors (35739424).

71478842 is a wasteful number, since it uses less digits than its factorization.

71478842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35739423.

The product of its digits is 100352, while the sum is 41.

The square root of 71478842 is about 8454.5160713077. The cubic root of 71478842 is about 415.0105808499.

The spelling of 71478842 in words is "seventy-one million, four hundred seventy-eight thousand, eight hundred forty-two".