106721345 has 8 divisors (see below), whose sum is σ = 128157120. Its totient is φ = 85316080.

The previous prime is 106721327. The next prime is 106721369. The reversal of 106721345 is 543127601.

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

It is not a de Polignac number, because 106721345 - 2¹⁸ = 106459201 is a prime.

It is a super-2 number, since 2×106721345² = 22778890957218050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950 + ... + 14640.

It is an arithmetic number, because the mean of its divisors is an integer number (16019640).

Almost surely, 2^106721345 is an apocalyptic number.

It is an amenable number.

106721345 is a deficient number, since it is larger than the sum of its proper divisors (21435775).

106721345 is a wasteful number, since it uses less digits than its factorization.

106721345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15255.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 106721345 is about 10330.6023541708. The cubic root of 106721345 is about 474.3334621718. Note that the first 3 decimals are identical.

Adding to 106721345 its reverse (543127601), we get a palindrome (649848946).

The spelling of 106721345 in words is "one hundred six million, seven hundred twenty-one thousand, three hundred forty-five".