71052061 has 4 divisors (see below), whose sum is σ = 75231612. Its totient is φ = 66872512.

The previous prime is 71052053. The next prime is 71052073. The reversal of 71052061 is 16025017.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38675961 + 32376100 = 6219^2 + 5690^2 .

It is a cyclic number.

It is not a de Polignac number, because 71052061 - 2³ = 71052053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71052161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2089750 + ... + 2089783.

It is an arithmetic number, because the mean of its divisors is an integer number (18807903).

Almost surely, 2^71052061 is an apocalyptic number.

It is an amenable number.

71052061 is a deficient number, since it is larger than the sum of its proper divisors (4179551).

71052061 is a wasteful number, since it uses less digits than its factorization.

71052061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179550.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 71052061 is about 8429.2384590780. The cubic root of 71052061 is about 414.1829591882.

Adding to 71052061 its reverse (16025017), we get a palindrome (87077078).

The spelling of 71052061 in words is "seventy-one million, fifty-two thousand, sixty-one".