1640242 has 8 divisors (see below), whose sum is σ = 2495232. Its totient is φ = 808500.

The previous prime is 1640231. The next prime is 1640263. The reversal of 1640242 is 2420461.

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

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, 5634 + ... + 5917.

It is an arithmetic number, because the mean of its divisors is an integer number (311904).

2^1640242 is an apocalyptic number.

1640242 is a deficient number, since it is larger than the sum of its proper divisors (854990).

1640242 is a wasteful number, since it uses less digits than its factorization.

1640242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11624.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1640242 is about 1280.7193291272. The cubic root of 1640242 is about 117.9331710068.

The spelling of 1640242 in words is "one million, six hundred forty thousand, two hundred forty-two".