71356042 has 4 divisors (see below), whose sum is σ = 107034066. Its totient is φ = 35678020.

The previous prime is 71355983. The next prime is 71356057. The reversal of 71356042 is 24065317.

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., 55666521 + 15689521 = 7461^2 + 3961^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71356042.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17839009 + ... + 17839012.

Almost surely, 2^71356042 is an apocalyptic number.

71356042 is a deficient number, since it is larger than the sum of its proper divisors (35678024).

71356042 is a wasteful number, since it uses less digits than its factorization.

71356042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35678023.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 71356042 is about 8447.2505586137. The cubic root of 71356042 is about 414.7727831528.

The spelling of 71356042 in words is "seventy-one million, three hundred fifty-six thousand, forty-two".