142221503 has 4 divisors (see below), whose sum is σ = 144344280. Its totient is φ = 140098728.

The previous prime is 142221493. The next prime is 142221509. The reversal of 142221503 is 305122241.

142221503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 142221503 - 2¹² = 142217407 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 (142221509) 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, 1061288 + ... + 1061421.

It is an arithmetic number, because the mean of its divisors is an integer number (36086070).

Almost surely, 2^142221503 is an apocalyptic number.

142221503 is a deficient number, since it is larger than the sum of its proper divisors (2122777).

142221503 is an equidigital number, since it uses as much as digits as its factorization.

142221503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122776.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 142221503 is about 11925.6657256524. The cubic root of 142221503 is about 521.9814722607.

Adding to 142221503 its reverse (305122241), we get a palindrome (447343744).

The spelling of 142221503 in words is "one hundred forty-two million, two hundred twenty-one thousand, five hundred three".