1642128 has 20 divisors (see below), whose sum is σ = 4242288. Its totient is φ = 547360.

The previous prime is 1642117. The next prime is 1642141. The reversal of 1642128 is 8212461.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1642098 and 1642107.

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, 17058 + ... + 17153.

2^1642128 is an apocalyptic number.

It is an amenable number.

1642128 is an abundant number, since it is smaller than the sum of its proper divisors (2600160).

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

1642128 is a wasteful number, since it uses less digits than its factorization.

1642128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34222 (or 34216 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 1642128 is about 1281.4554225567. The cubic root of 1642128 is about 117.9783547389.

Adding to 1642128 its reverse (8212461), we get a palindrome (9854589).

It can be divided in two parts, 1642 and 128, that added together give a triangular number (1770 = T₅₉).

The spelling of 1642128 in words is "one million, six hundred forty-two thousand, one hundred twenty-eight".