1086781 has 8 divisors (see below), whose sum is σ = 1169280. Its totient is φ = 1006848.

The previous prime is 1086769. The next prime is 1086791. The reversal of 1086781 is 1876801.

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

It is not a de Polignac number, because 1086781 - 2⁵ = 1086749 is a prime.

It is a super-2 number, since 2×1086781² = 2362185883922, which contains 22 as substring.

It is a Duffinian number.

1086781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1086731) 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, 285 + ... + 1501.

It is an arithmetic number, because the mean of its divisors is an integer number (146160).

2^1086781 is an apocalyptic number.

It is an amenable number.

1086781 is a deficient number, since it is larger than the sum of its proper divisors (82499).

1086781 is a wasteful number, since it uses less digits than its factorization.

1086781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1086781 is about 1042.4878896179. The cubic root of 1086781 is about 102.8128376020.

It can be divided in two parts, 108 and 6781, that added together give a square (6889 = 83²).

The spelling of 1086781 in words is "one million, eighty-six thousand, seven hundred eighty-one".