1649955 has 16 divisors (see below), whose sum is σ = 2731680. Its totient is φ = 849408.

The previous prime is 1649927. The next prime is 1649959. The reversal of 1649955 is 5599461.

It is not a de Polignac number, because 1649955 - 2⁹ = 1649443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1649959) 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, 1462 + ... + 2331.

It is an arithmetic number, because the mean of its divisors is an integer number (170730).

2^1649955 is an apocalyptic number.

1649955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1649955 is a deficient number, since it is larger than the sum of its proper divisors (1081725).

1649955 is a wasteful number, since it uses less digits than its factorization.

1649955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830.

The product of its digits is 48600, while the sum is 39.

The square root of 1649955 is about 1284.5057415208. The cubic root of 1649955 is about 118.1655007954.

The spelling of 1649955 in words is "one million, six hundred forty-nine thousand, nine hundred fifty-five".