106078021 has 8 divisors (see below), whose sum is σ = 121294400. Its totient is φ = 90877248.

The previous prime is 106078009. The next prime is 106078031. The reversal of 106078021 is 120870601.

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

It is not a de Polignac number, because 106078021 - 2¹¹ = 106075973 is a prime.

It is a super-2 number, since 2×106078021² = 22505093078552882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106078031) 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, 23830 + ... + 27928.

It is an arithmetic number, because the mean of its divisors is an integer number (15161800).

Almost surely, 2^106078021 is an apocalyptic number.

It is an amenable number.

106078021 is a deficient number, since it is larger than the sum of its proper divisors (15216379).

106078021 is an equidigital number, since it uses as much as digits as its factorization.

106078021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7803.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 106078021 is about 10299.4184787298. The cubic root of 106078021 is about 473.3784351103.

The spelling of 106078021 in words is "one hundred six million, seventy-eight thousand, twenty-one".