1559641 has 4 divisors (see below), whose sum is σ = 1609984. Its totient is φ = 1509300.

The previous prime is 1559617. The next prime is 1559647. The reversal of 1559641 is 1469551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1469551 = 61 ⋅24091.

It is a cyclic number.

It is not a de Polignac number, because 1559641 - 2⁵ = 1559609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 50311 = 1559641 / (1 + 5 + 5 + 9 + 6 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1559647) 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, 25125 + ... + 25186.

It is an arithmetic number, because the mean of its divisors is an integer number (402496).

2^1559641 is an apocalyptic number.

It is an amenable number.

1559641 is a deficient number, since it is larger than the sum of its proper divisors (50343).

1559641 is an equidigital number, since it uses as much as digits as its factorization.

1559641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50342.

The product of its digits is 5400, while the sum is 31.

The square root of 1559641 is about 1248.8558763925. The cubic root of 1559641 is about 115.9689026828.

The spelling of 1559641 in words is "one million, five hundred fifty-nine thousand, six hundred forty-one".