2106729 has 20 divisors (see below), whose sum is σ = 3252480. Its totient is φ = 1357560.

The previous prime is 2106679. The next prime is 2106733. The reversal of 2106729 is 9276012.

It is not a de Polignac number, because 2106729 - 2⁹ = 2106217 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2¹³ + 1 + 0 + 6⁴ + 7 + 2²¹ + 9² .

2106729 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2106749) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2092 + ... + 2930.

It is an arithmetic number, because the mean of its divisors is an integer number (162624).

2^2106729 is an apocalyptic number.

It is an amenable number.

2106729 is a deficient number, since it is larger than the sum of its proper divisors (1145751).

2106729 is an equidigital number, since it uses as much as digits as its factorization.

2106729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 2106729 is about 1451.4575432991. The cubic root of 2106729 is about 128.1945487171.

It can be divided in two parts, 210672 and 9, that added together give a square (210681 = 459²).

The spelling of 2106729 in words is "two million, one hundred six thousand, seven hundred twenty-nine".