70078521 has 8 divisors (see below), whose sum is σ = 93484864. Its totient is φ = 46695600.

The previous prime is 70078501. The next prime is 70078531. The reversal of 70078521 is 12587007.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70078521 - 2¹⁸ = 69816377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70078501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3075 + ... + 12231.

It is an arithmetic number, because the mean of its divisors is an integer number (11685608).

Almost surely, 2^70078521 is an apocalyptic number.

It is an amenable number.

70078521 is a deficient number, since it is larger than the sum of its proper divisors (23406343).

70078521 is a wasteful number, since it uses less digits than its factorization.

70078521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11711.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 70078521 is about 8371.2914774245. The cubic root of 70078521 is about 412.2825711801.

The spelling of 70078521 in words is "seventy million, seventy-eight thousand, five hundred twenty-one".