70021147 has 12 divisors (see below), whose sum is σ = 86245560. Its totient is φ = 56486976.

The previous prime is 70021129. The next prime is 70021163. The reversal of 70021147 is 74112007.

It is not a de Polignac number, because 70021147 - 2¹¹ = 70019099 is a prime.

It is a super-2 number, since 2×70021147² = 9805922054391218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70021187) 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 11 ways as a sum of consecutive naturals, for example, 41197 + ... + 42862.

It is an arithmetic number, because the mean of its divisors is an integer number (7187130).

Almost surely, 2^70021147 is an apocalyptic number.

70021147 is a deficient number, since it is larger than the sum of its proper divisors (16224413).

70021147 is a wasteful number, since it uses less digits than its factorization.

70021147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84090 (or 84083 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 70021147 is about 8367.8639448786. The cubic root of 70021147 is about 412.1700271453.

The spelling of 70021147 in words is "seventy million, twenty-one thousand, one hundred forty-seven".