71025239 has 4 divisors (see below), whose sum is σ = 71146824. Its totient is φ = 70903656.

The previous prime is 71025223. The next prime is 71025271. The reversal of 71025239 is 93252017.

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

It is a cyclic number.

It is not a de Polignac number, because 71025239 - 2⁴ = 71025223 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 (71055239) 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, 59912 + ... + 61085.

It is an arithmetic number, because the mean of its divisors is an integer number (17786706).

Almost surely, 2^71025239 is an apocalyptic number.

71025239 is a deficient number, since it is larger than the sum of its proper divisors (121585).

71025239 is a wasteful number, since it uses less digits than its factorization.

71025239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121584.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 71025239 is about 8427.6472992170. The cubic root of 71025239 is about 414.1308349037.

The spelling of 71025239 in words is "seventy-one million, twenty-five thousand, two hundred thirty-nine".