70106021 has 8 divisors (see below), whose sum is σ = 72616800. Its totient is φ = 67601520.

The previous prime is 70106017. The next prime is 70106027. The reversal of 70106021 is 12060107.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 70106021 - 2² = 70106017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70106027) 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, 43610 + ... + 45188.

It is an arithmetic number, because the mean of its divisors is an integer number (9077100).

Almost surely, 2^70106021 is an apocalyptic number.

It is an amenable number.

70106021 is a deficient number, since it is larger than the sum of its proper divisors (2510779).

70106021 is a wasteful number, since it uses less digits than its factorization.

70106021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 70106021 is about 8372.9338346842. The cubic root of 70106021 is about 412.3364930182.

Adding to 70106021 its reverse (12060107), we get a palindrome (82166128).

It can be divided in two parts, 7010 and 6021, that added together give a palindrome (13031).

The spelling of 70106021 in words is "seventy million, one hundred six thousand, twenty-one".