1656241 has 4 divisors (see below), whose sum is σ = 1671012. Its totient is φ = 1641472.

The previous prime is 1656229. The next prime is 1656247. The reversal of 1656241 is 1426561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1426561 = 59 ⋅24179.

It can be written as a sum of positive squares in 2 ways, for example, as 883600 + 772641 = 940^2 + 879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656241 - 2⁵ = 1656209 is a prime.

It is a Duffinian number.

1656241 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1656247) 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, 7216 + ... + 7441.

It is an arithmetic number, because the mean of its divisors is an integer number (417753).

2^1656241 is an apocalyptic number.

It is an amenable number.

1656241 is a deficient number, since it is larger than the sum of its proper divisors (14771).

1656241 is a wasteful number, since it uses less digits than its factorization.

1656241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14770.

The product of its digits is 1440, while the sum is 25.

The square root of 1656241 is about 1286.9502709895. The cubic root of 1656241 is about 118.3153729712.

The spelling of 1656241 in words is "one million, six hundred fifty-six thousand, two hundred forty-one".