1642128103 has 16 divisors (see below), whose sum is σ = 2117928960. Its totient is φ = 1235455200.

The previous prime is 1642128083. The next prime is 1642128109. The reversal of 1642128103 is 3018212461.

It is not a de Polignac number, because 1642128103 - 2¹⁷ = 1641997031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642128109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365463 + ... + 369928.

It is an arithmetic number, because the mean of its divisors is an integer number (132370560).

Almost surely, 2^1642128103 is an apocalyptic number.

1642128103 is a deficient number, since it is larger than the sum of its proper divisors (475800857).

1642128103 is a wasteful number, since it uses less digits than its factorization.

1642128103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735438.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1642128103 is about 40523.1798234048. The cubic root of 1642128103 is about 1179.7835720561.

The spelling of 1642128103 in words is "one billion, six hundred forty-two million, one hundred twenty-eight thousand, one hundred three".