1667485 has 4 divisors (see below), whose sum is σ = 2000988. Its totient is φ = 1333984.

The previous prime is 1667473. The next prime is 1667489. The reversal of 1667485 is 5847661.

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 459684 + 1207801 = 678^2 + 1099^2 .

It is a cyclic number.

It is not a de Polignac number, because 1667485 - 2⁷ = 1667357 is a prime.

It is a Duffinian number.

1667485 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166744 + ... + 166753.

It is an arithmetic number, because the mean of its divisors is an integer number (500247).

2^1667485 is an apocalyptic number.

It is an amenable number.

1667485 is a deficient number, since it is larger than the sum of its proper divisors (333503).

1667485 is an equidigital number, since it uses as much as digits as its factorization.

1667485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333502.

The product of its digits is 40320, while the sum is 37.

The square root of 1667485 is about 1291.3113489782. The cubic root of 1667485 is about 118.5825118036.

It can be divided in two parts, 166748 and 5, that added together give a triangular number (166753 = T₅₇₇).

The spelling of 1667485 in words is "one million, six hundred sixty-seven thousand, four hundred eighty-five".