142309903 has 4 divisors (see below), whose sum is σ = 142948288. Its totient is φ = 141671520.

The previous prime is 142309897. The next prime is 142309987. The reversal of 142309903 is 309903241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142309903 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 (142309103) 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, 318858 + ... + 319303.

It is an arithmetic number, because the mean of its divisors is an integer number (35737072).

Almost surely, 2^142309903 is an apocalyptic number.

142309903 is a deficient number, since it is larger than the sum of its proper divisors (638385).

142309903 is an equidigital number, since it uses as much as digits as its factorization.

142309903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638384.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 142309903 is about 11929.3714419495. The cubic root of 142309903 is about 522.0895984445.

The spelling of 142309903 in words is "one hundred forty-two million, three hundred nine thousand, nine hundred three".