1649285 has 16 divisors (see below), whose sum is σ = 2184192. Its totient is φ = 1185600.

The previous prime is 1649267. The next prime is 1649287. The reversal of 1649285 is 5829461.

1649285 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 1649285 - 2¹⁰ = 1648261 is a prime.

It is a super-2 number, since 2×1649285² = 5440282022450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649287) 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, 8540 + ... + 8730.

It is an arithmetic number, because the mean of its divisors is an integer number (136512).

2^1649285 is an apocalyptic number.

It is an amenable number.

1649285 is a deficient number, since it is larger than the sum of its proper divisors (534907).

1649285 is a wasteful number, since it uses less digits than its factorization.

1649285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364.

The product of its digits is 17280, while the sum is 35.

The square root of 1649285 is about 1284.2449143368. The cubic root of 1649285 is about 118.1495040754.

It can be divided in two parts, 1649 and 285, that multiplied together give a triangular number (469965 = T₉₆₉).

The spelling of 1649285 in words is "one million, six hundred forty-nine thousand, two hundred eighty-five".