106306721 has 8 divisors (see below), whose sum is σ = 110289600. Its totient is φ = 102345040.

The previous prime is 106306703. The next prime is 106306723. The reversal of 106306721 is 127603601.

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 106306721 - 2¹⁰ = 106305697 is a prime.

It is a super-2 number, since 2×106306721² = 22602237859543682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106306723) 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, 5306 + ... + 15516.

It is an arithmetic number, because the mean of its divisors is an integer number (13786200).

Almost surely, 2^106306721 is an apocalyptic number.

It is an amenable number.

106306721 is a deficient number, since it is larger than the sum of its proper divisors (3982879).

106306721 is a wasteful number, since it uses less digits than its factorization.

106306721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10599.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 106306721 is about 10310.5150695782. The cubic root of 106306721 is about 473.7183859551.

The spelling of 106306721 in words is "one hundred six million, three hundred six thousand, seven hundred twenty-one".