1640055 has 16 divisors (see below), whose sum is σ = 2709504. Its totient is φ = 846240.

The previous prime is 1640053. The next prime is 1640057. The reversal of 1640055 is 5500461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1640053) and next prime (1640057).

It is not a de Polignac number, because 1640055 - 2¹ = 1640053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1299 + ... + 2228.

It is an arithmetic number, because the mean of its divisors is an integer number (169344).

2^1640055 is an apocalyptic number.

1640055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1640055 is a deficient number, since it is larger than the sum of its proper divisors (1069449).

1640055 is a wasteful number, since it uses less digits than its factorization.

1640055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3566.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1640055 is about 1280.6463211988. The cubic root of 1640055 is about 117.9286890784.

The spelling of 1640055 in words is "one million, six hundred forty thousand, fifty-five".