106121605 has 4 divisors (see below), whose sum is σ = 127345932. Its totient is φ = 84897280.

The previous prime is 106121591. The next prime is 106121627. The reversal of 106121605 is 506121601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64738116 + 41383489 = 8046^2 + 6433^2 .

It is a de Polignac number, because none of the positive numbers 2^k-106121605 is a prime.

It is a super-2 number, since 2×106121605² = 22523590095552050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10612156 + ... + 10612165.

It is an arithmetic number, because the mean of its divisors is an integer number (31836483).

Almost surely, 2^106121605 is an apocalyptic number.

It is an amenable number.

106121605 is a deficient number, since it is larger than the sum of its proper divisors (21224327).

106121605 is an equidigital number, since it uses as much as digits as its factorization.

106121605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21224326.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 106121605 is about 10301.5341090539. The cubic root of 106121605 is about 473.4432581545.

The spelling of 106121605 in words is "one hundred six million, one hundred twenty-one thousand, six hundred five".