1656089 has 8 divisors (see below), whose sum is σ = 1783368. Its totient is φ = 1532160.

The previous prime is 1656079. The next prime is 1656101. The reversal of 1656089 is 9806561.

It can be written as a sum of positive squares in 4 ways, for example, as 10000 + 1646089 = 100^2 + 1283^2 .

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 1656089 - 2⁴ = 1656073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1656019) 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, 239 + ... + 1835.

It is an arithmetic number, because the mean of its divisors is an integer number (222921).

2^1656089 is an apocalyptic number.

It is an amenable number.

1656089 is a deficient number, since it is larger than the sum of its proper divisors (127279).

1656089 is a wasteful number, since it uses less digits than its factorization.

1656089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1656089 is about 1286.8912152937. The cubic root of 1656089 is about 118.3117534322.

The spelling of 1656089 in words is "one million, six hundred fifty-six thousand, eighty-nine".