1642104 has 24 divisors (see below), whose sum is σ = 4447560. Its totient is φ = 547344.

The previous prime is 1642093. The next prime is 1642117. The reversal of 1642104 is 4012461.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×1642104³ = 13283827633346222592, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11332 + ... + 11475.

It is an arithmetic number, because the mean of its divisors is an integer number (185315).

2^1642104 is an apocalyptic number.

It is an amenable number.

1642104 is an abundant number, since it is smaller than the sum of its proper divisors (2805456).

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

1642104 is a wasteful number, since it uses less digits than its factorization.

1642104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22819 (or 22812 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1642104 is about 1281.4460581702. The cubic root of 1642104 is about 117.9777799778.

Adding to 1642104 its reverse (4012461), we get a palindrome (5654565).

The spelling of 1642104 in words is "one million, six hundred forty-two thousand, one hundred four".