1772345 has 4 divisors (see below), whose sum is σ = 2126820. Its totient is φ = 1417872.

The previous prime is 1772341. The next prime is 1772359. The reversal of 1772345 is 5432771.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5432771 = 1049 ⋅5179.

It can be written as a sum of positive squares in 2 ways, for example, as 674041 + 1098304 = 821^2 + 1048^2 .

It is a cyclic number.

It is not a de Polignac number, because 1772345 - 2² = 1772341 is a prime.

It is a d-powerful number, because it can be written as 1 + 7⁴ + 7⁵ + 2¹⁹ + 3¹¹ + 4¹⁰ + 5⁵ .

It is not an unprimeable number, because it can be changed into a prime (1772341) 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, 177230 + ... + 177239.

It is an arithmetic number, because the mean of its divisors is an integer number (531705).

2^1772345 is an apocalyptic number.

It is an amenable number.

1772345 is a deficient number, since it is larger than the sum of its proper divisors (354475).

1772345 is an equidigital number, since it uses as much as digits as its factorization.

1772345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354474.

The product of its digits is 5880, while the sum is 29.

The square root of 1772345 is about 1331.2944828249. The cubic root of 1772345 is about 121.0178467859.

The spelling of 1772345 in words is "one million, seven hundred seventy-two thousand, three hundred forty-five".