70645271 has 4 divisors (see below), whose sum is σ = 70780872. Its totient is φ = 70509672.

The previous prime is 70645241. The next prime is 70645273. The reversal of 70645271 is 17254607.

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 70645271 - 2⁶ = 70645207 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 (70645273) 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, 67016 + ... + 68061.

It is an arithmetic number, because the mean of its divisors is an integer number (17695218).

Almost surely, 2^70645271 is an apocalyptic number.

70645271 is a deficient number, since it is larger than the sum of its proper divisors (135601).

70645271 is a wasteful number, since it uses less digits than its factorization.

70645271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135600.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 70645271 is about 8405.0741222193. The cubic root of 70645271 is about 413.3910138170.

Adding to 70645271 its reverse (17254607), we get a palindrome (87899878).

The spelling of 70645271 in words is "seventy million, six hundred forty-five thousand, two hundred seventy-one".