70564521 has 4 divisors (see below), whose sum is σ = 94086032. Its totient is φ = 47043012.

The previous prime is 70564477. The next prime is 70564547. The reversal of 70564521 is 12546507.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12546507 = 3 ⋅4182169.

It is not a de Polignac number, because 70564521 - 2⁶ = 70564457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70562521) 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, 11760751 + ... + 11760756.

It is an arithmetic number, because the mean of its divisors is an integer number (23521508).

Almost surely, 2^70564521 is an apocalyptic number.

It is an amenable number.

70564521 is a deficient number, since it is larger than the sum of its proper divisors (23521511).

70564521 is a wasteful number, since it uses less digits than its factorization.

70564521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23521510.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 70564521 is about 8400.2691028324. The cubic root of 70564521 is about 413.2334470016.

The spelling of 70564521 in words is "seventy million, five hundred sixty-four thousand, five hundred twenty-one".