106721266 has 4 divisors (see below), whose sum is σ = 160081902. Its totient is φ = 53360632.

The previous prime is 106721261. The next prime is 106721267. The reversal of 106721266 is 662127601.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 662127601 = 151 ⋅4384951.

It can be written as a sum of positive squares in only one way, i.e., 66080641 + 40640625 = 8129^2 + 6375^2 .

It is a super-2 number, since 2×106721266² = 22778857233285512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (106721261) 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 as a sum of consecutive naturals, namely, 26680315 + ... + 26680318.

Almost surely, 2^106721266 is an apocalyptic number.

106721266 is a deficient number, since it is larger than the sum of its proper divisors (53360636).

106721266 is an equidigital number, since it uses as much as digits as its factorization.

106721266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53360635.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 106721266 is about 10330.5985305790. The cubic root of 106721266 is about 474.3333451307. Note that the first 4 decimals are identical.

Adding to 106721266 its reverse (662127601), we get a palindrome (768848867).

It can be divided in two parts, 10 and 6721266, that added together give a palindrome (6721276).

The spelling of 106721266 in words is "one hundred six million, seven hundred twenty-one thousand, two hundred sixty-six".