1642255 has 8 divisors (see below), whose sum is σ = 2019024. Its totient is φ = 1281600.

The previous prime is 1642247. The next prime is 1642259. The reversal of 1642255 is 5522461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1642255 - 2³ = 1642247 is a prime.

It is a Duffinian number.

1642255 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642259) 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 7 ways as a sum of consecutive naturals, for example, 3801 + ... + 4210.

It is an arithmetic number, because the mean of its divisors is an integer number (252378).

2^1642255 is an apocalyptic number.

1642255 is a deficient number, since it is larger than the sum of its proper divisors (376769).

1642255 is an equidigital number, since it uses as much as digits as its factorization.

1642255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8057.

The product of its digits is 2400, while the sum is 25.

The square root of 1642255 is about 1281.5049746294. The cubic root of 1642255 is about 117.9813960903.

The spelling of 1642255 in words is "one million, six hundred forty-two thousand, two hundred fifty-five".