142644103 has 4 divisors (see below), whose sum is σ = 163021840. Its totient is φ = 122266368.

The previous prime is 142644101. The next prime is 142644133. The reversal of 142644103 is 301446241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301446241 = 1069 ⋅281989.

It is not a de Polignac number, because 142644103 - 2¹ = 142644101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142644101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10188858 + ... + 10188871.

It is an arithmetic number, because the mean of its divisors is an integer number (40755460).

Almost surely, 2^142644103 is an apocalyptic number.

142644103 is a deficient number, since it is larger than the sum of its proper divisors (20377737).

142644103 is an equidigital number, since it uses as much as digits as its factorization.

142644103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20377736.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 142644103 is about 11943.3706716320. The cubic root of 142644103 is about 522.4979699714.

The spelling of 142644103 in words is "one hundred forty-two million, six hundred forty-four thousand, one hundred three".