106298821 has 4 divisors (see below), whose sum is σ = 106321644. Its totient is φ = 106276000.

The previous prime is 106298791. The next prime is 106298827. The reversal of 106298821 is 128892601.

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 94361796 + 11937025 = 9714^2 + 3455^2 .

It is a 3-Lehmer number, since φ(106298821) divides (106298821-1)³.

It is a cyclic number.

It is not a de Polignac number, because 106298821 - 2⁵ = 106298789 is a prime.

It is a super-2 number, since 2×106298821² = 22598878691980082, which contains 22 as substring.

It is a deceptive number, since it divides R_106298820.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106298827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1630 + ... + 14671.

It is an arithmetic number, because the mean of its divisors is an integer number (26580411).

Almost surely, 2^106298821 is an apocalyptic number.

106298821 is the 6521-st heptagonal number.

It is an amenable number.

106298821 is a deficient number, since it is larger than the sum of its proper divisors (22823).

106298821 is an equidigital number, since it uses as much as digits as its factorization.

106298821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22822.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 106298821 is about 10310.1319584184. The cubic root of 106298821 is about 473.7066511437.

The spelling of 106298821 in words is "one hundred six million, two hundred ninety-eight thousand, eight hundred twenty-one".