1662545 has 4 divisors (see below), whose sum is σ = 1995060. Its totient is φ = 1330032.

The previous prime is 1662527. The next prime is 1662547. The reversal of 1662545 is 5452661.

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

It can be written as a sum of positive squares in 2 ways, for example, as 638401 + 1024144 = 799^2 + 1012^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662545 - 2²⁰ = 613969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1662547) 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, 166250 + ... + 166259.

It is an arithmetic number, because the mean of its divisors is an integer number (498765).

2^1662545 is an apocalyptic number.

It is an amenable number.

1662545 is a deficient number, since it is larger than the sum of its proper divisors (332515).

1662545 is an equidigital number, since it uses as much as digits as its factorization.

1662545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332514.

The product of its digits is 7200, while the sum is 29.

The square root of 1662545 is about 1289.3971459562. The cubic root of 1662545 is about 118.4652939483.

The spelling of 1662545 in words is "one million, six hundred sixty-two thousand, five hundred forty-five".