106842781 has 8 divisors (see below), whose sum is σ = 109597400. Its totient is φ = 104120640.

The previous prime is 106842779. The next prime is 106842787. The reversal of 106842781 is 187248601.

It can be written as a sum of positive squares in 4 ways, for example, as 443556 + 106399225 = 666^2 + 10315^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 106842781 - 2¹ = 106842779 is a prime.

It is a super-2 number, since 2×106842781² = 22830759703627922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 106842781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106842787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386 + ... + 14683.

It is an arithmetic number, because the mean of its divisors is an integer number (13699675).

Almost surely, 2^106842781 is an apocalyptic number.

It is an amenable number.

106842781 is a deficient number, since it is larger than the sum of its proper divisors (2754619).

106842781 is a wasteful number, since it uses less digits than its factorization.

106842781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16239.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 106842781 is about 10336.4781719888. The cubic root of 106842781 is about 474.5133053713.

The spelling of 106842781 in words is "one hundred six million, eight hundred forty-two thousand, seven hundred eighty-one".