1642345 has 8 divisors (see below), whose sum is σ = 1980864. Its totient is φ = 1307184.

The previous prime is 1642339. The next prime is 1642363. The reversal of 1642345 is 5432461.

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 1642345 - 2⁵ = 1642313 is a prime.

It is a d-powerful number, because it can be written as 1 + 6⁵ + 4⁴ + 2¹⁵ + 3¹³ + 4⁶ + 5⁵ .

It is a Duffinian number.

It is an unprimeable number.

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, 412 + ... + 1858.

It is an arithmetic number, because the mean of its divisors is an integer number (247608).

2^1642345 is an apocalyptic number.

It is an amenable number.

1642345 is a deficient number, since it is larger than the sum of its proper divisors (338519).

1642345 is a wasteful number, since it uses less digits than its factorization.

1642345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679.

The product of its digits is 2880, while the sum is 25.

The square root of 1642345 is about 1281.5400891115. The cubic root of 1642345 is about 117.9835512838.

The spelling of 1642345 in words is "one million, six hundred forty-two thousand, three hundred forty-five".