1669745 has 16 divisors (see below), whose sum is σ = 2498688. Its totient is φ = 1040640.

The previous prime is 1669741. The next prime is 1669747. The reversal of 1669745 is 5479661.

It is not a de Polignac number, because 1669745 - 2² = 1669741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1669699 and 1669708.

It is not an unprimeable number, because it can be changed into a prime (1669741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1784 + ... + 2553.

It is an arithmetic number, because the mean of its divisors is an integer number (156168).

2^1669745 is an apocalyptic number.

It is an amenable number.

1669745 is a deficient number, since it is larger than the sum of its proper divisors (828943).

1669745 is a wasteful number, since it uses less digits than its factorization.

1669745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360.

The product of its digits is 45360, while the sum is 38.

The square root of 1669745 is about 1292.1861321033. The cubic root of 1669745 is about 118.6360606097.

The spelling of 1669745 in words is "one million, six hundred sixty-nine thousand, seven hundred forty-five".