1601863 has 4 divisors (see below), whose sum is σ = 1653568. Its totient is φ = 1550160.

The previous prime is 1601861. The next prime is 1601867. The reversal of 1601863 is 3681061.

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

It is a cyclic number.

It is not a de Polignac number, because 1601863 - 2¹ = 1601861 is a prime.

It is a Duffinian number.

1601863 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601861) 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, 25806 + ... + 25867.

It is an arithmetic number, because the mean of its divisors is an integer number (413392).

2^1601863 is an apocalyptic number.

1601863 is a deficient number, since it is larger than the sum of its proper divisors (51705).

1601863 is an equidigital number, since it uses as much as digits as its factorization.

1601863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51704.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1601863 is about 1265.6472652363. The cubic root of 1601863 is about 117.0060872962.

The spelling of 1601863 in words is "one million, six hundred one thousand, eight hundred sixty-three".