1645163 has 4 divisors (see below), whose sum is σ = 1771728. Its totient is φ = 1518600.

The previous prime is 1645157. The next prime is 1645169. The reversal of 1645163 is 3615461.

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

It is an interprime number because it is at equal distance from previous prime (1645157) and next prime (1645169).

It is a cyclic number.

It is not a de Polignac number, because 1645163 - 2⁶ = 1645099 is a prime.

It is a super-2 number, since 2×1645163² = 5413122593138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63263 + ... + 63288.

It is an arithmetic number, because the mean of its divisors is an integer number (442932).

2^1645163 is an apocalyptic number.

1645163 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1645163 is a deficient number, since it is larger than the sum of its proper divisors (126565).

1645163 is a wasteful number, since it uses less digits than its factorization.

1645163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126564.

The product of its digits is 2160, while the sum is 26.

The square root of 1645163 is about 1282.6390762798. The cubic root of 1645163 is about 118.0509929945.

The spelling of 1645163 in words is "one million, six hundred forty-five thousand, one hundred sixty-three".