1086721 has 8 divisors (see below), whose sum is σ = 1121760. Its totient is φ = 1052352.

The previous prime is 1086703. The next prime is 1086731. The reversal of 1086721 is 1276801.

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 1086721 - 2⁵ = 1086689 is a prime.

It is a Duffinian 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, 6586 + ... + 6748.

It is an arithmetic number, because the mean of its divisors is an integer number (140220).

2^1086721 is an apocalyptic number.

It is an amenable number.

1086721 is a deficient number, since it is larger than the sum of its proper divisors (35039).

1086721 is a wasteful number, since it uses less digits than its factorization.

1086721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1086721 is about 1042.4591119080. The cubic root of 1086721 is about 102.8109455055.

The spelling of 1086721 in words is "one million, eighty-six thousand, seven hundred twenty-one".