142645903 has 4 divisors (see below), whose sum is σ = 142686288. Its totient is φ = 142605520.

The previous prime is 142645897. The next prime is 142645957. The reversal of 142645903 is 309546241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309546241 = 14699 ⋅21059.

It is a cyclic number.

It is not a de Polignac number, because 142645903 - 2⁵ = 142645871 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 (142643903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14326 + ... + 22147.

It is an arithmetic number, because the mean of its divisors is an integer number (35671572).

Almost surely, 2^142645903 is an apocalyptic number.

142645903 is a deficient number, since it is larger than the sum of its proper divisors (40385).

142645903 is an equidigital number, since it uses as much as digits as its factorization.

142645903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40384.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 142645903 is about 11943.4460270058. The cubic root of 142645903 is about 522.5001677311.

The spelling of 142645903 in words is "one hundred forty-two million, six hundred forty-five thousand, nine hundred three".