1641603 has 8 divisors (see below), whose sum is σ = 2264400. Its totient is φ = 1056608.

The previous prime is 1641593. The next prime is 1641613. The reversal of 1641603 is 3061461.

It is an interprime number because it is at equal distance from previous prime (1641593) and next prime (1641613).

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 1641603 - 2⁴ = 1641587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1641603.

It is not an unprimeable number, because it can be changed into a prime (1641613) 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, 9348 + ... + 9521.

It is an arithmetic number, because the mean of its divisors is an integer number (283050).

2^1641603 is an apocalyptic number.

1641603 is a deficient number, since it is larger than the sum of its proper divisors (622797).

1641603 is a wasteful number, since it uses less digits than its factorization.

1641603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18901.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1641603 is about 1281.2505609755. The cubic root of 1641603 is about 117.9657805591.

The spelling of 1641603 in words is "one million, six hundred forty-one thousand, six hundred three".