1840042 has 4 divisors (see below), whose sum is σ = 2760066. Its totient is φ = 920020.

The previous prime is 1840031. The next prime is 1840043. The reversal of 1840042 is 2400481.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1320201 + 519841 = 1149^2 + 721^2 .

It is not an unprimeable number, because it can be changed into a prime (1840043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460009 + ... + 460012.

2^1840042 is an apocalyptic number.

1840042 is a deficient number, since it is larger than the sum of its proper divisors (920024).

1840042 is an equidigital number, since it uses as much as digits as its factorization.

1840042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920023.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1840042 is about 1356.4814779421. The cubic root of 1840042 is about 122.5394458557.

The spelling of 1840042 in words is "one million, eight hundred forty thousand, forty-two".