1645053 has 4 divisors (see below), whose sum is σ = 2193408. Its totient is φ = 1096700.

The previous prime is 1645019. The next prime is 1645087. The reversal of 1645053 is 3505461.

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: 3505461 = 3 ⋅1168487.

It is an interprime number because it is at equal distance from previous prime (1645019) and next prime (1645087).

It is a cyclic number.

It is not a de Polignac number, because 1645053 - 2⁶ = 1644989 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274173 + ... + 274178.

It is an arithmetic number, because the mean of its divisors is an integer number (548352).

2^1645053 is an apocalyptic number.

It is an amenable number.

1645053 is a deficient number, since it is larger than the sum of its proper divisors (548355).

1645053 is an equidigital number, since it uses as much as digits as its factorization.

1645053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548354.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1645053 is about 1282.5961952228. The cubic root of 1645053 is about 118.0483618674.

The spelling of 1645053 in words is "one million, six hundred forty-five thousand, fifty-three".