1645713 has 6 divisors (see below), whose sum is σ = 2377154. Its totient is φ = 1097136.

The previous prime is 1645691. The next prime is 1645727. The reversal of 1645713 is 3175461.

1645713 is a `hidden beast` number, since 1 + 645 + 7 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1557504 + 88209 = 1248^2 + 297^2 .

It is not a de Polignac number, because 1645713 - 2⁵ = 1645681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645733) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91420 + ... + 91437.

2^1645713 is an apocalyptic number.

It is an amenable number.

1645713 is a deficient number, since it is larger than the sum of its proper divisors (731441).

1645713 is a wasteful number, since it uses less digits than its factorization.

1645713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182863 (or 182860 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 1645713 is about 1282.8534600647. The cubic root of 1645713 is about 118.0641468709.

The spelling of 1645713 in words is "one million, six hundred forty-five thousand, seven hundred thirteen".