106721156 has 6 divisors (see below), whose sum is σ = 186762030. Its totient is φ = 53360576.

The previous prime is 106721149. The next prime is 106721191. The reversal of 106721156 is 651127601.

It can be written as a sum of positive squares in only one way, i.e., 100320256 + 6400900 = 10016^2 + 2530^2 .

It is a super-2 number, since 2×106721156² = 22778810275952672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13340141 + ... + 13340148.

It is an arithmetic number, because the mean of its divisors is an integer number (31127005).

Almost surely, 2^106721156 is an apocalyptic number.

It is an amenable number.

106721156 is a deficient number, since it is larger than the sum of its proper divisors (80040874).

106721156 is a wasteful number, since it uses less digits than its factorization.

106721156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26680293 (or 26680291 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 106721156 is about 10330.5932065879. The cubic root of 106721156 is about 474.3331821620. Note that the first 3 decimals are identical.

Adding to 106721156 its reverse (651127601), we get a palindrome (757848757).

The spelling of 106721156 in words is "one hundred six million, seven hundred twenty-one thousand, one hundred fifty-six".