106721872 has 20 divisors (see below), whose sum is σ = 211583680. Its totient is φ = 52119648.

The previous prime is 106721831. The next prime is 106721891. The reversal of 106721872 is 278127601.

It is a happy number.

It is a super-2 number, since 2×106721872² = 22779115926368768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76872 + ... + 78247.

It is an arithmetic number, because the mean of its divisors is an integer number (10579184).

Almost surely, 2^106721872 is an apocalyptic number.

It is an amenable number.

106721872 is a deficient number, since it is larger than the sum of its proper divisors (104861808).

106721872 is a wasteful number, since it uses less digits than its factorization.

106721872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155170 (or 155164 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 106721872 is about 10330.6278608805. The cubic root of 106721872 is about 474.3342429382.

It can be divided in two parts, 10672 and 1872, that added together give a square (12544 = 112²).

The spelling of 106721872 in words is "one hundred six million, seven hundred twenty-one thousand, eight hundred seventy-two".