1640042 has 8 divisors (see below), whose sum is σ = 2589600. Its totient is φ = 776844.

The previous prime is 1640033. The next prime is 1640053. The reversal of 1640042 is 2400461.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1640042.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21542 + ... + 21617.

It is an arithmetic number, because the mean of its divisors is an integer number (323700).

2^1640042 is an apocalyptic number.

1640042 is a deficient number, since it is larger than the sum of its proper divisors (949558).

1640042 is a wasteful number, since it uses less digits than its factorization.

1640042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43180.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1640042 is about 1280.6412456266. The cubic root of 1640042 is about 117.9283774879.

The spelling of 1640042 in words is "one million, six hundred forty thousand, forty-two".