71164042 has 4 divisors (see below), whose sum is σ = 106746066. Its totient is φ = 35582020.

The previous prime is 71164031. The next prime is 71164043. The reversal of 71164042 is 24046117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24046117 = 3373 ⋅7129.

It can be written as a sum of positive squares in only one way, i.e., 70408881 + 755161 = 8391^2 + 869^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71163998 and 71164016.

It is not an unprimeable number, because it can be changed into a prime (71164043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17791009 + ... + 17791012.

Almost surely, 2^71164042 is an apocalyptic number.

71164042 is a deficient number, since it is larger than the sum of its proper divisors (35582024).

71164042 is a wasteful number, since it uses less digits than its factorization.

71164042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35582023.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 71164042 is about 8435.8782589604. The cubic root of 71164042 is about 414.4004348283.

The spelling of 71164042 in words is "seventy-one million, one hundred sixty-four thousand, forty-two".