1670465 has 4 divisors (see below), whose sum is σ = 2004564. Its totient is φ = 1336368.

The previous prime is 1670447. The next prime is 1670477. The reversal of 1670465 is 5640761.

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 1329409 + 341056 = 1153^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670465 - 2¹⁰ = 1669441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 167042 + ... + 167051.

It is an arithmetic number, because the mean of its divisors is an integer number (501141).

2^1670465 is an apocalyptic number.

It is an amenable number.

1670465 is a deficient number, since it is larger than the sum of its proper divisors (334099).

1670465 is an equidigital number, since it uses as much as digits as its factorization.

1670465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334098.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1670465 is about 1292.4646997114. The cubic root of 1670465 is about 118.6531102569.

The spelling of 1670465 in words is "one million, six hundred seventy thousand, four hundred sixty-five".