1649545 has 8 divisors (see below), whose sum is σ = 1999296. Its totient is φ = 1306416.

The previous prime is 1649539. The next prime is 1649567. The reversal of 1649545 is 5459461.

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 1649545 - 2¹¹ = 1647497 is a prime.

It is an Ulam number.

It is a Duffinian number.

1649545 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1649545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087 + ... + 2116.

It is an arithmetic number, because the mean of its divisors is an integer number (249912).

2^1649545 is an apocalyptic number.

It is an amenable number.

1649545 is a deficient number, since it is larger than the sum of its proper divisors (349751).

1649545 is a wasteful number, since it uses less digits than its factorization.

1649545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311.

The product of its digits is 21600, while the sum is 34.

The square root of 1649545 is about 1284.3461371453. The cubic root of 1649545 is about 118.1557122721.

The spelling of 1649545 in words is "one million, six hundred forty-nine thousand, five hundred forty-five".