70671021 has 8 divisors (see below), whose sum is σ = 94313184. Its totient is φ = 47071440.

The previous prime is 70671017. The next prime is 70671031. The reversal of 70671021 is 12017607.

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

It is not a de Polignac number, because 70671021 - 2² = 70671017 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 70670982 and 70671000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70671011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6546 + ... + 13571.

It is an arithmetic number, because the mean of its divisors is an integer number (11789148).

Almost surely, 2^70671021 is an apocalyptic number.

It is an amenable number.

70671021 is a deficient number, since it is larger than the sum of its proper divisors (23642163).

70671021 is a wasteful number, since it uses less digits than its factorization.

70671021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21291.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 70671021 is about 8406.6057954444. The cubic root of 70671021 is about 413.4412343314.

Adding to 70671021 its reverse (12017607), we get a palindrome (82688628).

The spelling of 70671021 in words is "seventy million, six hundred seventy-one thousand, twenty-one".