1605963 has 8 divisors (see below), whose sum is σ = 2161728. Its totient is φ = 1060424.

The previous prime is 1605941. The next prime is 1605971. The reversal of 1605963 is 3695061.

It is a happy number.

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 1605963 - 2⁵ = 1605931 is a prime.

It is a super-4 number, since 4×1605963⁴ (a number of 26 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1605963.

It is not an unprimeable number, because it can be changed into a prime (1605913) 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, 2181 + ... + 2822.

It is an arithmetic number, because the mean of its divisors is an integer number (270216).

2^1605963 is an apocalyptic number.

1605963 is a deficient number, since it is larger than the sum of its proper divisors (555765).

1605963 is a wasteful number, since it uses less digits than its factorization.

1605963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 1605963 is about 1267.2659547230. The cubic root of 1605963 is about 117.1058287120.

The spelling of 1605963 in words is "one million, six hundred five thousand, nine hundred sixty-three".