1645085 has 8 divisors (see below), whose sum is σ = 2126040. Its totient is φ = 1214784.

The previous prime is 1645019. The next prime is 1645087. The reversal of 1645085 is 5805461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52441 + 1592644 = 229^2 + 1262^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1645085 - 2¹⁰ = 1644061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12590 + ... + 12719.

It is an arithmetic number, because the mean of its divisors is an integer number (265755).

2^1645085 is an apocalyptic number.

It is an amenable number.

1645085 is a deficient number, since it is larger than the sum of its proper divisors (480955).

1645085 is a wasteful number, since it uses less digits than its factorization.

1645085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25327.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1645085 is about 1282.6086698600. The cubic root of 1645085 is about 118.0491272983.

The spelling of 1645085 in words is "one million, six hundred forty-five thousand, eighty-five".