1656041 has 4 divisors (see below), whose sum is σ = 1660500. Its totient is φ = 1651584.

The previous prime is 1656019. The next prime is 1656043. The reversal of 1656041 is 1406561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1008016 + 648025 = 1004^2 + 805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1656041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1655998 and 1656016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616 + ... + 2433.

It is an arithmetic number, because the mean of its divisors is an integer number (415125).

2^1656041 is an apocalyptic number.

It is an amenable number.

1656041 is a deficient number, since it is larger than the sum of its proper divisors (4459).

1656041 is an equidigital number, since it uses as much as digits as its factorization.

1656041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1656041 is about 1286.8725655635. The cubic root of 1656041 is about 118.3106103738.

The spelling of 1656041 in words is "one million, six hundred fifty-six thousand, forty-one".