106721575 has 12 divisors (see below), whose sum is σ = 139300360. Its totient is φ = 80883360.

The previous prime is 106721569. The next prime is 106721581. The reversal of 106721575 is 575127601.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (106721569) and next prime (106721581).

It is not a de Polignac number, because 106721575 - 2³ = 106721567 is a prime.

It is a super-2 number, since 2×106721575² = 22778989140961250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 106721575.

It is a congruent number.

It is an unprimeable number.

It is a nontrivial repunit in base 474.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111864 + ... + 112813.

Almost surely, 2^106721575 is an apocalyptic number.

106721575 is a deficient number, since it is larger than the sum of its proper divisors (32578785).

106721575 is a wasteful number, since it uses less digits than its factorization.

106721575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224706 (or 224701 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 106721575 is about 10330.6134861391. The cubic root of 106721575 is about 474.3338029241. Note that the first 3 decimals are identical.

The spelling of 106721575 in words is "one hundred six million, seven hundred twenty-one thousand, five hundred seventy-five".