1642044 has 24 divisors (see below), whose sum is σ = 3856720. Its totient is φ = 543744.

The previous prime is 1642033. The next prime is 1642049. The reversal of 1642044 is 4402461.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1962 + ... + 2670.

2^1642044 is an apocalyptic number.

It is an amenable number.

1642044 is an abundant number, since it is smaller than the sum of its proper divisors (2214676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642044 is a wasteful number, since it uses less digits than its factorization.

1642044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1642044 is about 1281.4226469046. The cubic root of 1642044 is about 117.9763430503.

The spelling of 1642044 in words is "one million, six hundred forty-two thousand, forty-four".