71252089 has 4 divisors (see below), whose sum is σ = 71270820. Its totient is φ = 71233360.

The previous prime is 71252063. The next prime is 71252113. The reversal of 71252089 is 98025217.

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 29106025 + 42146064 = 5395^2 + 6492^2 .

It is a cyclic number.

It is not a de Polignac number, because 71252089 - 2¹¹ = 71250041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71252009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1402 + ... + 12019.

It is an arithmetic number, because the mean of its divisors is an integer number (17817705).

Almost surely, 2^71252089 is an apocalyptic number.

It is an amenable number.

71252089 is a deficient number, since it is larger than the sum of its proper divisors (18731).

71252089 is a wasteful number, since it uses less digits than its factorization.

71252089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18730.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 71252089 is about 8441.0952488406. The cubic root of 71252089 is about 414.5712686595.

It can be divided in two parts, 7125208 and 9, that added together give a palindrome (7125217).

The spelling of 71252089 in words is "seventy-one million, two hundred fifty-two thousand, eighty-nine".