1745545 has 4 divisors (see below), whose sum is σ = 2094660. Its totient is φ = 1396432.

The previous prime is 1745537. The next prime is 1745561. The reversal of 1745545 is 5455471.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5455471 = 7 ⋅779353.

It can be written as a sum of positive squares in 2 ways, for example, as 484416 + 1261129 = 696^2 + 1123^2 .

It is a cyclic number.

It is not a de Polignac number, because 1745545 - 2³ = 1745537 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

1745545 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174550 + ... + 174559.

It is an arithmetic number, because the mean of its divisors is an integer number (523665).

2^1745545 is an apocalyptic number.

It is an amenable number.

1745545 is a deficient number, since it is larger than the sum of its proper divisors (349115).

1745545 is an equidigital number, since it uses as much as digits as its factorization.

1745545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349114.

The product of its digits is 14000, while the sum is 31.

The square root of 1745545 is about 1321.1907508002. The cubic root of 1745545 is about 120.4047674186.

The spelling of 1745545 in words is "one million, seven hundred forty-five thousand, five hundred forty-five".